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Información sobre FRITZ!Box 6840 LTE

The update file "FRITZ.Box_6840_LTE.105.xx.xx.image" on contains the latest FRITZ!OS (Firmware) for the FRITZ!Box 6840 LTE.

Attention: This update file is intended for use only with FRITZ!Box 6840 LTE!
Please follow the instructions at the end of this file to install the update.

Product: FRITZ!Box 6840 LTE

Version: FRITZ!OS 6.84

Language: English, French, Spanish, Italian, Polish

Release date: 07/06/2017

New functions : - Necessary update to ensure compatibility with mobile networks supporting the QAM64 property in the upload
- FRITZ!Hotspot: the wireless guest access with additional functions for cafés, shops and practices (captive portal)
- Reservation of data rates
- Extended Smart Home functions and more for MyFRITZ!
- FRITZ!Fon: new start screens und a night service
- Extra security and network adjustments
- Necessary adjustments to changes in the Telefonica network configuration (O2/E-Plus)

Below you find a complete list and descriptions of the new functions in the latest FRITZ!OS, along with a list of further improvements in this version.


New and improved Features in FRITZ!OS 6.84

NEW: TR069 query parameters supported for LTE connection

NEW: Display of Internet use by guests in the Online Monitor
NEW: Guaranteed data rate for home network devices despite intensive use of the guest network
NEW: Option for autonomous port sharing (UPnP/PCP) can be enabled for each device

NEW: Option to limit the number of outgoing calls to foreign numbers, enabled automatically
NEW: Call diversion applicable to all contacts in a telephone book

NEW: Support added for operating CAT-iq 2.0-compliant handsets
NEW: New start screens - including "Smart Home" for an overview and for fast switching of connected Smart Home devices (like FRITZ!DECT 200*)
NEW: Night service for FRITZ!Fon*

Home network:
NEW: IP address (DHCP) can be changed directly in the device details

Smart Home:
NEW: Display of temperature curve over the last 24h for devices with temperature sensor
NEW: Group switching for radiator controls
NEW: Switching of the FRITZ!DECT 200/210* smart plug by sounds, like clapping or knocking

NEW: FRITZ!Hotspot - the wireless guest access with additional functions for cafés, shops or practices: Captive portal with own logo, text and link to own homepage.
Details at

NEW: New convenience features added to user interface and optimized display on smartphones and tablets (responsive design)

NEW: Password for registering an IP telephone with the FRITZ!Box must have at least eight characters. IP telephones with a shorter password will be disabled with this update.
NEW: Certain settings and features require additional confirmation by the user where the FRITZ!Box is located

Storage (NAS):
NEW: FRITZNAS user interface optimized for tablets and smartphones (responsive design)


Priorities in WiFi
With the FRITZ!OS 6.80 update users can be sure to surf, stream or chat without interference even if the guest network is highly used. So you can decide which transmission rates you and your guests are entitled to. If the FRITZ!Box owners are not online, the guests can enjoy higher data rates. The new online monitor is also very handy, since it now displays the data rates of the guest access on top of the usual downstream rates for Internet and IPTV.

FRITZ!Fon: additional start screens and night service
FRITZ!Fon, the DECT telephone for FRITZ!Box, received new selectable start screens. Users now have their Smart Home products in direct view and can switch even easier. The analog clock displayed in white or black is also new. The new night service is dimming the display when the brightness in the room falls below the settings. The possibility to configure a call diversion with the FRITZ!Box can now also be used with any contact in the requested telephone book. Plus, the number of outgoing calls can be limited with FRITZ!OS 6.80.

Smart Home: switch on sound
The smart plugs FRITZ!DECT 200 and DECT 210 can already be switched automatically at sunrise/sunset or according to an individual schedule via app or phone. Now another option was added: with FRITZ!OS 6.80 an acoustic sensor is activated locally in the smart plug. Lamps or other connected devices will then react to sounds like clapping or knocking. Another innovation is the display of the temperature measured over the last 24 hours in the FRITZ!Box user interface. Starting with FRITZ!OS 6.80, group switching can also be used for the new radiator control FRITZ!DECT 300.

Even better and easier: MyFRITZ! for browser and app
Following the user interface - the window to the FRITZ!Box - with FRITZ!OS 6.83 the user interfaces of the MyFRITZ! service ( and FRITZ!NAS now also appear in a responsive design and adjust to any display size. Using the MyFRITZ!App 2 (for Android) users have convenient access to saved data, their call list or voice messages wherever the are. Users will receive real time notifications via the app about missed calls or new voice messages. With a single swipe you can establish a secure connection to your home network and access your FRITZ!Box and connected devices from on the go. Even Smart Home devices can be operated and switched directly via app or widget.

On the safe side: strong passwords and settings requiring confirmation
The configuration of new IP phones and call diversions as well as the saving of backup files is even safer now as a new function implements an additional confirmation that can only be verified where the FRITZ!Box is located (two-factor authentication). Attempts to log in with wrong user data are recorded as an event. On top of this, FRITZ!OS 6.83 makes sure that users assign a password with at least 8 digits when configuring an IP telephone or an IP intercom system via the FRITZ!Box. Numerous other FRITZ!OS 6.83 upgrades provide the FRITZ!Box with the latest security standards. With every large update AVM always advises to install the latest version of FRITZ!OS for optimum security and best network synchronization.

FRITZ! convenience with DECT telephones from other manufacturers
With FRITZ!OS 6.83 DECT telephones that support the CAT-iq 2.0 standard offer many convenience features that come with FRITZ! telephony. For example, cordless telephones from other manufacturers can use one or more telephone books in the FRITZ!Box and users can get a quick overview with the call list.

Approve access from the Internet for online games, gaming consoles or IP devices
Devices connected to the FRITZ!Box are safe from unauthorized access from the Internet. However, certain applications such as online games or devices like IP cameras or gaming consoles sometimes need to be accessible for others over the Internet. FRITZ!Box users can enable such connections through port sharing. Now it's also possible to allow certain devices to control port sharing automatically. With FRITZ!OS 6.83 all shared ports (IPv4, IPv6, MyFRITZ! or autonomous) can be viewed and configured at once. Users can find an overview of all shared ports with their connected home network devices in the menu at "Internet" "Permit Access". Settings for parental controls can also be used with pure IPv6 devices with the new FRITZ!OS.


Additional improvements in FRITZ!OS 06.84

Fixed: Necessary update to ensure compatibility with mobile networks supporting the QAM64 property in the upload

Remedied: After reconnecting via LTE, the connection for 2. PDN was sometimes not resumed correctly on the IP layer


Additional improvements in FRITZ!OS 06.83

Improved: Consideration of changes in the Telefonica network configuration (O2/E-Plus)
Improved: Expanded diagnostics function for LTE
Improved: Optimized stability
Improved: Various optimizations for modem behavior
Improved: Timeouts in response to missing network responses optimized
Improved: Increased robustness in case of reconnect

Improved: Display of online time in the parental controls overview
Improved: Labeling of time axes in the Online Monitor
Improved: Filters for websites take account of blocked domains for https calls as well
Improved: Support for pure IPv6 devices in parental controls
Improved: Port sharing combined with MyFRITZ! sharing and IPv6 sharing
Improved: Complete firewall exceptions possible for downstream routers with IPv6
Improved: Static routes can be defined for IPv6
Improved: Faster surfing through optimized treatment of DNS queries
Improved: IPTV stability when used simultaneously via LAN and wireless LAN
Remedied: After reconnecting via LTE, the connection was sometimes not resumed correctly on the IP layer
Bug fix: Shifted time scale in the graphic overview of permitted online time on

Change: Configuration of an IP telephone requires that assigned user names have at least 8 characters
Change: The option for IP telephones to allow registration from the Internet is disabled after the update *.
Improved: Optimized position of group filter in the configuration wizard for Google contacts
Improved: Better voice quality for Internet telephony through voice transmission with minimal delay
Improved: Faster connecting for Internet telephony during simultaneous data transmission
Improved: Better voice quality for Internet telephony even during data transmission via Deutsche Telekom connection
Improved: Scheduled switching settings for answering machine optimized for smartphone and tablet
Improved: Adjustments for Internet telephony with Personal-VoIP
Improved: Settings of packet size for "other provider", "SIP DDI line" and "SIP trunking"
Improved: Interoperability of message transmission (MWI) to connected IP telephones
Improved: Interoperability for transmission of faxes via the Internet (T.38 protocol)
Bug fix - Integration of a new Google telephone book now possible
Remedied: Rare interruption of calls in cases of Hold/Routing
Change: Adjustment to changed network conditions, as a consequence of which calls from Telekom, easybell and Alice connections to the UnityMedia/Kabel-BW network can fail

Improved: Entries in the telephone book now can be sorted by first and last name
Improved: The random
playback of music list now works across sub-folders
Improved: Podcasts can now be interrupted on the FRITZ!Fon (by the user or by incoming calls) and resumed at the point of interruption
Remedied: Telephone book entries with multiple telephone numbers were sometimes not adopted completely

Home network:
Improved: Display of device details completed
Remedied: "Deleting" unused devices in the home network list also removes VPN connections
Change: LAN ports 1 through 4 switched to power mode

Wireless LAN:
Improved: Shows the last time when auto-channel was refreshed
Improved: Deletion of all inactive wireless devices without individual settings from the list of known wireless devices
Improved: Scheduled switching settings optimized for smartphone and tablet
Remedied: Sporadic restart when a FRITZ!WLAN Repeater 1750E was connected on the 5-GHz band
Improved: Better stability

Smart Home:
Improved - Additional options to prevent manual switching of FRITZ!DECT 200 smart plug

Improved - Diagnostics of "Function" and "Security" includes MyFRITZ!
Improved - Optimized registration of MyFRITZ! account

Improved - Attempts to log in with wrong user data recorded in Event Log
Improved - Access via FTPS supports ECDHE ciphers
Change - Registeration with FRITZ!Box user interface valid for 20 min
Change - Increased security of FRITZ!Box's own certificate through signature with SHA 256

Improved - Optimized configuration of switching schedule by graphic time table for smartphone and tablet
Improved - FRITZ!OS update page also shows the last time the version was checked or the last time a FRITZ!OS was installed
Improved - Display of logins via FTP or SMB in the Event Log
Improved - Event log adjusted to different display sizes
Improved - User guidance for restoring saved settings
Improved - Push Service overview
Improved - Reworked mail subject line for push service mails and information about sender
Improved - Text edited in the FRITZ!Box Info mail from push service
Improved - Push service combines mails generated within a short period
Improved - Change notices for selected settings added to push service mails
Improved - Push service mail for use of guest access even when wireless network login/logout display disabled
Improved - Information on full storage medium for push service mails on fax reception, voice messages and function diagnostics
Improved - Important notifications for secure and reliable operation now also on FRITZ!Fon devices, via MyFRITZ!App 2 and by push service mail (Previously: only red Info LED and overview)
Improved - Better stability even in atypical load situations
Improved: Event message indicates a device interfering with IP TV (stutter during T-Entertain with Media Receiver 400)
Bug fix - Recurrent push mails (change notices) about first registration of powerline devices or devices without a clock
Bug fix - "Change notices" and "Forgot password" mail were not sent if the push service was configured with the answering machine or the fax function
Change - Interface descriptions for developers expanded (

Storage (NAS):
Improved - FTP and SMB service can be enabled/disabled independently of each other
Change - FTP service in the home network disabled upon delivery

Media server:
Improved: MagentaCLOUD supported as source for the FRITZ! media server (formerly T-Mediencenter)

We recommend every update for reasons of security as well. Further improvements to increase security with this version of FRITZ!OS are presented at in the area "Updates increase security".

* We recommend the encrypted connection of IP telephones from other locations using VPN

*Note on FRITZ!DECT 200 and FRITZ!Fon: At least version 3.80 required. FRITZ!Fon handsets must be updated.


New in FRITZ!OS 6.50

NEW: First configuration wizard determines an entry from the list of known Internet providers that fits the SIM card.
NEW: LTE frequency band selection expanded to include any number of subsets
NEW: Network list indicates connections' share of entire connection time for each mobile communications cell
NEW: LTE statistics completely reworked and expanded to include granular monitoring of the connection to the mobile network
NEW: Alignment aid and LTE monitor expanded to show the mobile communications cell currently connected
NEW: Mobile radio modem displayed separately in the Energy Monitor
NEW: Provider name from the PNN field of the SIM card also considered

NEW: Parental controls with tickets to extend online time as needed
NEW: Display of remaining online time and restrictions to Internet use with (parental controls)
NEW: Display of a longer Internet disruption (red "Info" LED and on "Overview" page of the user interface)
NEW: Use own local DNS server (IPv4 and IPv6)
NEW: Automated port sharing in the home network set up via the Port Control Protocol (PCP)
NEW: New filter for TCP port 25 to block unsecured e-mail dispatch (can be enabled under "Internet / Filters / Lists")
NEW: Online monitor converted to dynamic scaling
NEW: List of Internet providers revised and expanded
NEW: Individual name added to designate "Other Internet provider"
NEW: Display of a longer Internet disruption (red "Info" LED and on "Overview" page of the user interface)
NEW: Rates with PPP authentication now also supported via "Other provider" in the first configuration wizard

NEW: Displays loading of radio channel currently in use (temporal progress)
NEW: Option for granting Internet access via the guest access only after consent to terms of use (captive portal)
NEW: Wireless standard in the 2.4-GHz band set to "802.11n+g" (presetting changed)
NEW: Failed login attempts by wireless devices recorded in a separate list on the "Wireless / Radio Network" page.

Storage (NAS):
NEW: USB storage media use the drive name assigned on the computer (not active until factory settings configured)

Smart Home:
NEW: Support for Comet DECT radiator control from EUROtronic
NEW: Up to 140 freely configurable switching points for automatic switching "according to schedule"
NEW: Switch group via a master
NEW: Sequence of devices in the smart home overview can be defined
NEW: Usage data sent by push mail as a CSV attachment

NEW: All three operating modes of the answering machine can be scheduled: "Record messages", "Greeting only" and "off"
NEW: Blacklist for incoming calls: Complete telephone books can be used to block incoming calls
NEW: "Open door", "FRITZ!Fon ring tone" and "Live image" functions supported for door intercom systems
NEW: DTMF generation for analog extensions supported (required for door intercom systems)
NEW: Support for IP door intercom systems
NEW: Provider profile added for "sipgate point-to-point line"

NEW: Three new start screens: "New calls", "Answering machine" and "FRITZ!Box" (FRITZ!Fon C5, C4 and MT-F)
NEW: Large font setting for FRITZ!Fon C5, C4 and MT-F ("Settings / Display / Large font")
NEW: Management of live images for FRITZ!Fon added under "DECT / Web Services"
NEW: Remote operation of Comet DECT radiator control from EUROtronic
NEW: Support for door intercom systems with image transmission to FRITZ!Fon C5, C4 and MT-F
NEW: Improved audio transmission of web radio/podcast and media player (model-dependent, CELT codec)
NEW: Support for headset buttons (Call accept/disconnect)
NEW: Display of png and gif image formats on FRITZ!Fon handsets with color display
NEW: Gigaset handsets: Transmission of telephone books and individual entries to and from FRITZ!Box supported

Home network:
NEW: "Home network overview" of all connected devices
NEW: Central update function for all FRITZ! products in the home network
NEW: Deletion of inactive devices without special settings from the overview of network connections
NEW: Secure access to the user interface from connected FRITZ! devices via the FRITZ!Box password
NEW: Display of VPN users in the network connections overview

NEW: User interface in new responsive design for optimized display on smartphones and tablets
NEW: Completely new graphic design of the user interface
NEW: "Change notice" push service notifies about changes to selected settings and events
NEW: Push service sends mail with status after successful update (effective after next update)
NEW: Display of important notifications for secure, reliable operation with red "Info"' LED and on the start page

NEW: For increased security when accessing the user interface, now a FRITZ!Box password must be assigned during the first configuration
NEW: For increased security, a password must be assigned to backup files
NEW: Firewall "stealth mode" setting available under "Internet / Filters/ Lists / Global Filter Settings"
NEW: Option to prevent Internet telephony from the home network (under "Telephony / Telephone Numbers / Line Settings")

*Note on FRITZ!Fon: FRITZ!Fon handsets must be updated to at least version 01.03.68

New features for the FRITZ!Box—New design for FRITZ!OS 6.50, with better overview of the home network and over 120 innovations

The latest update offers a redesigned user interface at, optimized for smartphones, tablets and notebooks. In the browser it adjusts flexibly to the different display sizes. The user interface also has a fresh new look. The menu items and their arrangement remain familiar to users.

The extensive home network overview of all connected devices is also new. These include all wireless, LAN, powerline, DECT, smart home and USB devices. At a single glance users can see whether their connected FRITZ! products are equipped with the latest version of FRITZ!OS. You can start updates directly from here.

With the new FRITZ!OS you can also use helpful analyses of your wireless LAN environment. Under "Wireless / Radio Channel" the loading of the radio channel currently in use is shown over time. The lower the loading of the radio channel, the better the potential data throughput there.

Now there is an option for granting guest access to the wireless LAN or LAN only after consent to the FRITZ!Box owner's terms of use. The guest is taken first to a captive portal to signal consent. Without confirming this page, you cannot connect to the Internet.

News for parental controls: Tickets can be issued for each device to extend surfing time by 45 minutes. When online time has been exhausted, tickets can be redeemed on the Information page on blocked Internet use in the browser.
By going to with any network device, you can view the device's settings for Internet use and the amount of online time already used on the current day.

If there are problems with network access or Internet telephony, the FRITZ!Box notifies the user by lighting the "Info" LED red. The start page of the user interface displays more precise information about the reason for the disruption.

You can also benefit from new options for telephony: For instance, unwanted calls can now be blocked by setting up a blacklist in the telephone book.

There are plenty of new features for DECT as well: With three new start screens ("Answering machine", "FRITZ!Box" and "New calls"), now the FRITZ!Fon can be adapted even more flexibly to your needs. This makes important information and events easier to view and access. Tip: Update the software on FRITZ!Fon and press the "MENU" key twice.

A lot has been done for the smart home features as well: Now FRITZ!Fon supports door intercom systems with video function: When the doorbell rings, you can see every visitor right on your FRITZ!Fon. Support for the Comet DECT radiator thermostat opens up all kinds of new possibilities. The device is seamlessly integrated into the user interface of the new FRITZ!OS, allowing you to control the temperature at home and save costs through energy efficient heating.

Along with heating, now an advanced group function can be used to switch one or more actuators (FRITZ!DECT 200, FRITZ!Powerline 546E) on or off by temperature.
Use a FRITZ!DECT 200 or FRITZ!DECT Repeater 100 as the temperature sensor. More innovations in the smart home area include options for sunrise/sunset switching, up to 140 freely selectable switching points for the "according to schedule" option, and the dispatch of consumption data as an attachment to a push mail from FRITZ!DECT 200 and FRITZ!Powerline 546E.

Since AVM also optimizes the security of the entire FRITZ! family with every new FRITZ!OS, it is advisable for every user to perform the update. This way All-IP connections can be better protected from unauthorized Internet calls from the home network ("Telephony / Telephone Numbers / Line Settings"). The firewall can be operated in stealth mode to prevent ping queries. TLS security has been improved and port 25 received a new filter to block the unsecured e-mail dispatch.


Improvements and Bug Fixes in FRITZ!OS 6.50

Improved: Routine added to detect cross-border overlaps in frequency allocations (to avoid, e.g. unwanted connections to cells in Germany when "limited services" are set and the SIM card used is from Austria)
Improved: Cells from neighboring countries detected during scanning are now hidden in the scan plan.
Improved: Optimized scan plan to avoid parking on third-party cells now permanently enabled even after errors during connecting to cells belonging to contracted provider
Improved: Use of scan plan reworked
Improved: Processes in error handling optimized
Improved: First initialization of mobile communications modem better timed with start of other components
Improved: Loading of LTE modem firmware always prioritized
Improved: Optimized handling of modem firmware loading errors
Resolved: Detection and self-recovery integrated for rare non-responsive LTE-modem constellations (message: "modem not found")
Resolved: Possible blockade when IP address and cell switched at the same time
Improved: Optimized error handling routines
Resolved: Other minor bug fixes in the LTE modem driver and in control of the LTE modem
Resolved: No more band shares calculated to equal over 100 percent
Resolved: Second HPLMN of SIM card never used
Resolved: Reason for sporadic reboots eliminated
Resolved: PUK/PIN entry after three incorrect attempts corrected
Changed: Roaming option moved from "Advanced" to "Standard" view

Improved: Number of VPN connections raised from 8 to 12
Improved: Simpler configuration on Vodafone lines
Improved: VPN interoperability to external remote stations
Improved: Wireless LAN stability for using Entertain
Changed: "MyFRITZ!" menu command renamed "MyFRITZ! Account"
Resolved: Error when checking connection of user-defined Dynamic DNS provider
Resolved: In some cases, VPN settings of FRITZ!Box user did not contain a preshared key
Resolved: Delayed notifications in the wireless network for Android apps on IPv6 connections
Resolved: Fix for missing data of a guest access configuration on the start page
Resolved: After reboot, LAN traffic sometimes not forwarded to the WAN via the correct route

Improvement: Display of wireless LAN channels occupied by adjacent networks
Improved: Maximum possible data rate shown on the detail pages of wireless LAN devices in "Wireless / Radio Network"
Improved: Password evaluation for entry of wireless network key
Improved: Reworked messages on wireless LAN under "System / Events"
Improved: Wireless guest access now encrypted with WPA2 instead of WPA/WPA2 (mixed mode)
Resolved: In "Repeater" operating mode, changes to "Radio Channel Settings" led to permanent loss of connection to access point
Resolved: Transmission power for enabled guest access can be controlled again
Resolved: Wireless guest access can be enabled in the "Share existing Internet connection in the network (IP client)" mode again
Improved: Check for and consideration of any existing regulatory guidelines for wireless LAN expanded to all country guidelines. The following countries were added to the check procedure: Ireland, Montenegro, New Zealand, Namibia, Nigeria, Norway, Poland, Sweden, Slovakia, Tanzania, Thailand, Uganda, Cyprus
Resolved: Wireless without function when Namibia selected as country
Improved: Wireless LAN speed considerably improved for Internet access during high LTE throughput
Improved: Login procedure for Apple devices
Resolved: Error in Australian country settings

Storage (NAS):
Improved: Warning message on attempt to delete the "FRITZ!" folder
Improved: Media server supports thumbnails for contents of Synology NAS devices
Resolved: After releasing a directory for sharing with a user, NAS could no longer be reached by other users

Smart Home:
Improved: New switching options for sunrise/sunset
Improved: Temperature master as option for group switching
Improved stability

Improved: Display of longer disruption of IP-based telephony (red "Info" LED)
Improved: When selecting a range (e.g. mobile communications network) for dialing rules and call blocks, the exact range of telephone numbers is displayed
Improved: Names can be assigned for call blocks
Improved: Reworked display of call time for calls and voice messages
Improved: Diagnostics with improved texts and status displays for telephony problems
Improved: Detection of caller name optimized for internal answering machine
Improved: Error message when non-numeric characters entered for PIN for remote answering machine playback
Improved: New contacts in Google can be assigned to a selected group
Improved: New intercontinental range for call block/dialing rules to telephone numbers outside Europe
Improved: Better voice quality for FRITZ!Fon M2, C4 (equalizer updated)
Improved: "Internal numbers" telephone book offers editing and deletion for telephone numbers adopted from an upstream FRITZ!Box
Improved: If answering machine is set to pick up immediately, calls are rejected immediately when answering machine is busy
Improved: New voice memos signaled to the handset more quickly
Improved: New event when reading in telephone books fails because of too many entries
Improved: Changes to configurations of the answering machine modes "Record messages", "Greeting only" and "Schedule" can now be made without activating the given operating mode
Changed: For provider "Telekom", specification for DTMF transmission switched to "telephone event"
Changed: Status display of the telephony LED gray on the start page if at least one telephone number is not registered
Changed: Removed keypad code for resetting telephony settings (#99**)
Changed: Port for the STUN server at provider sipgate converted from port 10000 to standard port 3478
Resolved: Provider prefixes also considered for call diversion and "divert via"
Resolved: User name cannot be entered for Internet telephone numbers of
Resolved: Error in writing existing telephone book entries
Resolved: Malfunction during call diversion to inactive answering machines eliminated
Resolved: Inconsistencies in managing telephone numbers
Resolved: Deletion of SIP trunk telephone numbers generated inconsistencies in some cases
Resolved: Deletion of multiple messages on the answering machine can fail
Resolved: Failed parallel call ended internal call distribution in some cases
Resolved: Fax forwarding by e-mail could fail permanently when the push service was initially configured along with the fax machine
Resolved: For a substitute connection it was possible to use an incorrect number for outgoing calls
Resolved: When multiple IP telephones are registered, changes in certain constellations applied to a different IP telephone
Resolved: Double signaling of internally forwarded calls when push mail enabled for all calls
Resolved: Incoming calls sometimes interrupted voice transmission during existing telephone calls
Resolved: Possible incorrect display of telephone number for incoming international calls
Resolved: Connection possibly aborted when FRITZ!App Fon used for codec change during active connection
Resolved: After deletion of received fax documents, flashing "Info" LED not always reset correctly
Resolved: MWI disabled for VoIP provider "Telekom" and "Other providers" after editing
Improved: Adjusted presets for certain SIP providers (including Cyprus)
Resolved: Some SIP providers for Germany hidden from selection when other regional settings configured

Improved: "Schedule" operation mode added to the configuration menu of the answering machine
Improved: Pause function in the media player, for RSS feeds and podcasts ("OK" key)
Improved: Audio parameters adjusted for better voice quality at the edge of transmission range
Improved: Display of available FRITZ!OS updates on FRITZ!Fon "Events" start screen
Improved: Display does not turn off when "Live image" active
Improved: Live images can be cycled through by switch
Improved: Alarm rings even when Do Not Disturb enabled (locally)
Improved: Clearer display of smart home devices
Improved: "Advanced Security" for DECT connections (early encryption und rekeying)
Improved: Better compatibility of selected, newer Panasonic DECT devices with the FRITZ!Box
Improved: For newer Gigaset models: support for "mute/unmute" during a call
Improved: Gigaset: support of Gigaset's own telephone book options for various models
Resolved: New telephone book entries with more than one telephone number created on FRITZ!Fon not managed correctly
Improved: Optimized behavior after loss of base station by Gigaset handsets
Improved: If HD telephony disabled by user, web radio sometimes failed with "No audio available"

Home network:
Improved: Display of type and path of a device's connection to the FRITZ!Box now included in the details of the "Network Overview" page
Improved: "Network Overview" page with optimized listing of powerline devices with their own user interface
Improved: Reworked local IPv6 settings
Improved: All AVM FRITZ!Powerline products in the powerline network can now be updated from the FRITZ!Box user interface
Resolved: Fixed assignment of the same IPv4 address lost on restart

Improved: Check for available firmware update at conclusion of first configuration
Improved: Reworked content and display of push service mails
Improved: Link to the FRITZ!Box user interface in the footer of the push service mail can now be accessed externally as well (requires MyFRITZ! or Dynamic DNS)
Improved: Option to deactivate push service entirely
Improved: Settings backup now also includes parental controls, wireless guest access and basic smart home settings
Improved: Sorting function in tables in the user interface
Improved: Dispatch of "FRITZ!Box Info" push mail as needed
Improved: "FRITZ!Box Info" and "Wireless Guest Access" push mail sent before restart
Improved: Time-saving operation via optimized navigation in the user interface
Improved: Display of new functions via HTTPS before a FRITZ!OS update
Improved: New event for saving settings
Improved: Stability, eliminated possibility of continual reboots in special application scenarios
Changed: Update with a FRITZ!OS file is permitted only with the latest version of FRITZ!OS
Resolved: Error adopting settings for online telephone books
Improved: System more stable during high LTE throughput

Improved: Password evaluation during first configuration and configuration of MyFRITZ!
Improved: Secure TLS mandatory, support for SSLv3 removed

Improved: Function diagnosis of function takes own FRITZ!WLAN Repeaters into consideration when counting radio networks of that name in the vicinity
Improved: "Smart Home" area added to function diagnosis
Improved: Function diagnosis now includes detection of old wireless LAN devices (802.11b)
Improved: Send diagnostics results for "Function" and "Security" by mail

Further improvements to increase security with this version of FRITZ!OS are presented at in the area "Updates increase security".

New in FRITZ!OS 6.30

NEW: Multiple telephone numbers can be added at the same time for Telekom and Vodafone
NEW: IPv6 support according to 3GPP Release 8 and 3GPP Release 10

New FRITZ!OS 6.30 for interoperability, convenience and security

This version of FRITZ!OS includes modifications to better support the latest services offered by Internet providers.

The step to IP-based telephony is much simpler for new customers. Using the wizard for setting up new telephone numbers up to 10 telephone numbers can be created at once. This benefits not only Telekom and Vodafone customers, but also any users of "other providers" who use a single password for all of their telephone numbers.

Additional improvements to the LTE software provide for improved stability over various connections.

Improvements and Bug Fixes in FRITZ!OS 6.30

Improvement: improved detection of dead connections
Improvement: for mobile operator A1, connection to only PDN1 is tolerated
Improvement: faster initialization and restart of LTE module
Improvement: support for AMBR coding in accordance with 3GPP Release 10
Improvement: various optimizations in LTE modem software
Fixed: several minor bug fixes in LTE modem software
Fixed: under some circumstances SIM was not immediately recognized after update
Fixed: potential error when connecting to cells with 1.4 and 3 MHz bandwidth
Fixed: SIM PIN could not be changed during active LTE connection

Improvement: multiple telephone numbers with the same password can be added at the same time for "other providers"

Improvement: prevents creation of new call diversions to premium telephone numbers
Improvement: password evaluation when setting the FRITZ!Box password during first configuration
Improvement: MyFRITZ! configuration with stricter password guidelines

Further improvements to increase security with this version of FRITZ!OS are presented at in the "Updates increase security" area.
Access to the FRITZ!Box via Telnet is no longer supported


New with FRITZ!OS 6.21:

LTE: Interop and stability improvements


New with FRITZ!OS 6.20:

LTE: added support for LTE roaming (disabled by default)
LTE: added support for PPP authentication (PAP)
LTE: Interop improvements

Home net: display of MIMO standard in the detailed information about powerline devices
Home net: use of fixed IP addresses via DHCP server improved
Home net: change parental controls profile in the detailed settings for every network device

Internet: VPN connection to Android devices no longer disconnected after one hour
Internet: online counter now able to display higher bandwidths
Internet: when activating MyFRITZ! a random port for https will be selected
Internet: fixes a possibility to circumvent parental controls via guest access
Internet: added Diffie Hellmann Group 5, 14 and 15 for VPN
Internet: TR-069 connection request port is now closed once TR-069 has been deactivated
Internet: BPjM filter only active when country is set to Germany

Security: enhanced security area in wireless LAN settings
Security: assistance in choosing safe passwords
Security: push mails are now sent using SSL encryption by default
Security: import and export the SSL certificate used by your FRITZ!Box

Smart Home: use FRITZ!DECT Repeaters as temperature sensors
Smart Home: display the current temperature in FRITZ!Box GUI and MyFRITZ!App
Smart Home: configure push mail to inform you whenever FRITZ!DECT 200 is switched on or off
Smart Home: send a push mail when the connection to FRITZ!DECT 200 is lost
Smart Home: select individual power consumption value to enable standby

System: notification for important FRITZ!OS updates
System: crashes when using the new push services fixed
System: enables password to be set for the saved settings before an update
System: new FRITZ!OS Updates can be installed automatically (default setting)*
System: several improvements for the update process
System: improved scheduled switching for tablets and smartphones.

Telephony: change to oauth2 for authentication with Google contacts
Telephony: forced speed dial for phonebook entries fixed
Telephony: prefix "**8" is displayed when using Vanity Codes
Telephony: plausibility test for the entry of landline numbers fixed
Telephony: sporadic reboots when using IP telephones fixed
Telephony: improved voice quality in case of parallel data transfer (wireless LAN<->LAN)
Telephony/DECT: for mail reception, encrypted transmission via port 995 is always tried first
Telephony/DECT: improved functionality for Gigaset handsets
Telephony/DECT: ability to set and delete custom ringtones for online contacts
Telephony/DECT: display of current temperature on FRITZ!DECT handsets
Telephony/DECT: support for more audio codecs for FRITZ!DECT handsets (FLAC & OggVorbis)
Telephony/DECT: improved playback of web radio on FRITZ!DECT handsets
Telephony/DECT: improved sound quality for web radio/podcast/media player
Telephony/DECT: improved update of RSS feeds
Telephony/DECT: FRITZ!Fon C4 - improved automatic brightness adjustment**
Telephony/DECT: support for the new call list with voice messages**
Telephony/DECT: permanent signaling of e-mail on the handset fixed

USB: improved stability when disconnecting USB devices

WLAN: Wireless LAN auto channel can be updated over the user interface
WLAN: initial setup extended for wireless LAN information and setup
WLAN: list of access points in the wireless environment sorted by signal strength
WLAN: WPS for the wireless LAN guest access / private hotspot can be started via FRITZ!Box user interface
WLAN: detailed information about connected wireless devices (Rx/Tx data rate, RSSI value, wireless standard etc.)
WLAN: faster activation of changed wireless LAN settings
WLAN: improved display of the wireless guest access on the main page of the user interface
WLAN: improved printer view
WLAN: direct link to the wireless guest access on the main page
WLAN: MAC address filter moved to WLAN/Security
WLAN: connection by QR code enabled for main AP

* FRITZ!Box can periodically search for a new FRITZ!OS version and automatically update (usually at night); you can change the default setting at System/Update.

** Update of the FRITZ!Fon handset to at least version 3.29 required

When updating from a version older than 06.20 the SSL certificate of FRITZ!Box will change. If you are using an app or a program that uses the certificate, there might an error message.

Important: during the update of FRITZ!OS, services like telephony and IPTV will be disconnected temporarily.


Further changes in non-public intermediate versions:

NEW: Improved parental control, expanded for guest access
NEW: Parent control with shared budget for multiple devices
NEW: Simplified setup of VPN users, Ethernet-Ethernet connections and VPN access to office networks
NEW: Easy VPN setup for Smartphone VPN users
NEW: Support for Locator Identifier Separation Protocol (LISP)

NEW: Renovated MyFRITZ! access to voice messages, Smart Home and FRITZ!NAS for mobile devices
NEW: MyFRITZ! image viewer and audio player for files on fritz.nas

NEW: Wireless LAN guest access as "private hotspot"
NEW: Wireless LAN guest access restricted to surfing and mail in default settings
NEW: Wireless LAN guest access with automatically dispatch of usage log
NEW: printable information sheet with wireless LAN registration information and QR code makes it easier for guests to connect
NEW: supports the extension of the wireless LAN guest access via wireless repeater

NEW: integration of intercom systems
NEW: customized hold music (for your numbers / line settings)
NEW: support for SIP trunking

NEW: redialing with alternative telephone number
NEW: support for .wav files on FRITZ!Fon media player
NEW: sleep timer for FRITZ!Fon media player
NEW: customized music for alarm
NEW: music playlist for alarm
NEW: set ring tone directly from the media player
NEW: support for album covers on handsets with color display

Smart Home
NEW: enables standby detection and automatic power off
NEW: more customization options for time-triggered events
NEW: combine multiple devices in a group and trigger them together
NEW: set access rights to Smart Home for each user
NEW: save consumption data as .csv file

NEW: improved and expanded push service
NEW: keylock for DECT and WLAN keys on the FRITZ!Box
NEW: display of information for wireless LAN guest access and connected devices

New with FRITZ!OS 5.51:

- Security: removes possibility for unauthorized access to FRITZ!Box.

New with FRITZ!OS 5.50:

NEW: search and scroll in the telephone book
NEW: answering machine now has its own menu entry
NEW: upload your own welcome message
NEW: timer for the answering machine
NEW: set the alarm display message
NEW: IP telephones can be used over the Internet (connect your smartphone to the FRITZ!Box and use it over VoIP at home)

NEW: simplified entry of Internet account data
NEW: parental control overview now displayed in same design as home network
NEW: parental control now disconnects active sessions when surfing time is up
Improved performance with parental control enabled
Prevents sending of local IPv4 multicast information to the Internet
Fixed problem with dynamic DNS provider DNS4BIZ

NEW: new repeater function to improve the range of a wireless network***
Warning: If you were using WDS: with this update WDS has been changed. It is no longer
compatible with the older version of the repeater function.
NEW: allows automatic transfer of night service settings to your FRITZ!WLAN Repeater

NEW: media player for FRITZ!Fon and external players (uPNP-AV)
NEW: support for Smart Home (FRITZ!DECT 200)
NEW: record personal memos on the answering machine
NEW: navigation now possible in start/event screen of the FRITZ!Fon MT-F *
NEW: setup of alarm signal/web radio on the handset*
NEW: setup of favorites
Fixed problem with keylock deactivation on incoming call

Home Network
NEW: new Smart Home area in the Home Network menu
NEW: control of Smart Home devices via browser
NEW: integration of the smart plug FRITZ!DECT 200 in FRITZ!OS**
NEW: manual and automatic switching of FRITZ!DECT 200, from the home network or over the Internet
NEW: FRITZ!DECT 200 measures energy consumption of connected devices
NEW: all information and consumption details for FRITZ!DECT 200 in a push mail
NEW: display whether a network device is connected via repeater/powerline
NEW: integrated network time server provides time and date to all network devices
Improved display of device details

NEW: MyFRITZ! user can now login to MyFRITZ! and the FRITZ!Box with the same account
NEW: improved MyFRITZ! Start page for mobile devices, integrated Smart Home support
NEW: support for MyFRITZ! App (Android).
NEW: MyFRITZ! access for simple worldwide access to home network devices via subdomain name
NEW: When creating a new account from the FRITZ!Box web interface, the name of the FRITZ!Box will automatically be used in MyFRITZ!

NEW: new start page, quicker access to voice messages and comfort functions
NEW: FRITZ!Box user with different access rights for setup, telephone and storage
NEW: display new voice messages on the bottom right of the start page
Added new mailservers for push service setup
Start page now also displays status of LAN guest access and Smart Home
LAN settings moved to Home Network area

Important details regarding this update:

Tip: to use the new functions of the FRITZ!Box web interface, please use a
web browser with HTML5 support (for example the current versions of Chrome,
Firefox or Safari)

* To be able to use all new features of the FRITZ!Fon family, please also
update the firmware of the FRITZ!Fon.

**To use this function, the intelligent power plug FRITZ!DECT 200 is required

*** For more information about the new WLAN repeater function, please visit

Instructions for installing the update:

Use the update function offered in the user interface to install the update. This automatically offers you the right FRITZ!OS. Click "Wizards", select "Update" and then follow the instructions on the screen.
© AVM GmbH 2004-2017. All rights reserved.

This AVM firmware package contains files that are propagated under different licenses, in particular under a license held by AVM or under an open-source license (namely the GNU General Public License, GNU Lesser General Public License or FreeBSD License). For details on the various licenses, see the "license.txt" file (
The source code of the files propagated as open source files can be obtained upon a written request to

AVM grants the non-exclusive right to use this AVM firmware package, which is supplied exclusively in object code format. The licensee may create only one copy of the software, which may be used exclusively for backup use.
AVM reserves all rights that are not expressly granted to the licensee. Without previous approval in writing, and except for in cases permitted by law, it is particularly forbidden for this AVM firmware packet to be
- copied, propagated or in any other manner made publicly accessible, or
- processed, disassembled, reverse engineered, translated, decompiled or in any other manner "opened" and subsequently copied, propagated or made publicly accessible in any other manner.

TVI, SRi 2017-06-07