Info on FRITZ!Box 6820 LTE

The update file "FRITZ.Box_6820_LTE.142.xx.xx.image" on contains the latest FRITZ!OS (Firmware) for the FRITZ!Box 6820 LTE.

Attention: This update file is intended for use only with FRITZ!Box 6820 LTE! Please follow the instructions at the end of this file to install the update.

Product: FRITZ!Box 6820 LTE

Version: FRITZ!OS 7.01

Language: English, French, German, Italian, Polish, Spanish

Release date: 30/11/2018

New Features:

  • Mesh WiFi
  • New features for Mesh - Second FRITZ!Box as Mesh Repeater for WiFi
  • Register for regular status updates for your FRITZ!Box (MyFRITZ! report)
  • New features for the FRITZ! Hotspot
  • MyFRITZ! access to FRITZ!Box via internet now without security warning in the browser

Note: Instructions for configuring and using Mesh functions are presented at

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 Features in FRITZ!OS 7.00


  • New Register for regular status updates for your FRITZ!Box (MyFRITZ! report)
  • New MyFRITZ! internet access to the FRITZ!Box without a warning from the browser (SSL certificate from Let's Encrypt)

Home network:

  • New User interface with new "Home Network / Mesh" menu for all settings concerning Mesh
  • New In the factory settings, a second FRITZ!Box connected via Ethernet becomes a Mesh Repeater at the push of a button (WPS)
  • New Mesh events added to the event messages
  • New The settings for push services, auto updates and AVM services are applied to the entire Mesh WiFi

More information on the new features for Mesh is presented at "New features for Mesh" More information on configuration and using Mesh is presented at


  • New With a "FRITZ! Hotspot" it's easier than ever to give guests WiFi access in public places such as bars, restaurants, medical practices etc. For details, see "Wireless / Guest Access".

Smart Home:

  • New With Smart Home templates you can create different Smart Home device switching schedules for various occasions (like holidays, working shifts, or vacations), and switch between them at the click of a button

With each FRITZ!OS update, AVM also updates its security functions. Therefore we recommend performing the update for all devices.

Additional improvements in FRITZ!OS 7.01


  • Improved Display of internet connections on the "Overview" page also includes WAN connections
  • Improved Simplified display for internet connections on the "Overview" page under "Connections"
  • Improved Function for removing the FRITZ!Box from the MyFRITZ! account (
  • Improved Optimizations for data throughput
  • Improved Optimizations for DNS resolution
  • Improved Optimized registration of MyFRITZ! account ( also possible without enabling MyFRITZ! internet access, under "Internet / MyFRITZ! Account"
  • Improved SHA 2 support for VPN connections
  • Improved Filter for port 25 (unsecured mail sending) also effective for the Guest Access (Wireless LAN/LAN)
  • Change Parental controls no longer differentiate between Windows users
  • Change Devices blocked for internet use in the parental controls can be reached via VPN
  • Change Certificate signed by (for MyFRITZ! addresses)
  • Resolved "Default user already exists" message when configuring parental controls
  • Resolved Possible circumvention of time limits defined in parental controls
  • Resolved Circumvention of parental controls for certain blocked websites
  • Resolved The LAN ports for VPN were switched for LAN-LAN linkup
  • Resolved Improved VPN interoperability
  • Resolved VPN user connections not displayed in the home network overview
  • Resolved MyFRITZ! FTP links corrected
  • Resolved MyFRITZ! access or device with MyFRITZ! access could not be deleted under certain circumstances
  • Resolved Error while entering an already assigned IP address for a new device for port sharing
  • Resolved No IPv4 port sharing for devices with IPv6 interface ID during IPv4 internet connection without IPv6
  • Resolved IPv6 NAS sharing link could not be used
  • Resolved Google DynDNS service not supported

Home network:

  • Resolved Possible error message (Error code 1) when IP address entered manually in the Device Details
  • Change Connection Statistics area for the powerline network moved from the Network Device Details to the "Contents / FRITZ!Box Support" area


  • Improved Improved changing of SSID in Wireless Assistant during first configuration
  • Resolved Display of interference sources on "Wireless / Radio Channel" page in the "Use of the Wireless LAN Channels" list
  • Resolved The entire network environment of the base station is displayed in "Repeater" mode


  • Change The "Login without password (not recommended)" option in the FRITZ!Box user interface now requires pressing a button on the FRITZ!Box


  • Change Display of port for "Diagnostics & Maintenance"


  • New Additional confirmation for certain changes can now be performed using the Google Authenticator
  • Improved Redesigned "Auto Update" page
  • Improved Event protocol on the Mesh Master also contains all events on the other FRITZ! devices in the Mesh WiFi
  • Improved Push service sends mail after the update with additional information on the version and update progress
  • Improved "Change Notice" push service on new devices in the home network now also includes information on new Mesh Repeaters
  • Improved "New FRITZ!OS" push service now also includes planned time for auto updates
  • Improved Optimized time synchronization (NTP) after internet dial-in
  • Improved Consent to "Diagnostics and Maintenance" does not include permission for software updates
  • Improved Simplified display for configuration of wireless LAN, LAN and WAN in the "Interfaces" area of the "Overview" page
  • Improved Redesigned push services overview
  • Change For security reasons, the preconfigured user "ftpuser" can no longer be granted access from the internet
  • Change For FRITZ!Box users who are granted access from the internet, the password must be different from the user name
  • Change The security of new password assignments must be rated at least "medium" or they will be rejected
  • Change Additional confirmation for creating VPN connections

New features for Mesh

General information on Mesh is presented at

Enabling the Mesh Function

To check whether a FRITZ! product is enabled for Mesh, see the Mesh Overview of the FRITZ!Box (the Mesh Master) under "Home Network / Mesh". Here the products in the Mesh are designated with a corresponding "Mesh active" symbol.

A FRITZ!WLAN Repeater or FRITZ!Powerline Adapter with FRITZ!OS 6.90 or higher installed can be enabled for Mesh in various ways:

  • If the product has the factory settings configured and is being connected with the FRITZ!Box for the first time, it will be automatically enabled for Mesh.
  • If the product is already connected, but not enabled for Mesh, it is added to the Mesh by pressing a button on the product to be integrated and a button on the FRITZ!Box. On the FRITZ!Box, use the button that initiates WPS (depending on the model, press the "Connect" or "WPS" button briefly, or the "WLAN/WPS" button for 6 seconds)

Detailed instructions, additional information and the answers to frequently asked questions about Mesh are presented at

Configuring a second FRITZ!Box as a Mesh Repeater with the press of a button


  • Your existing FRITZ!Box supports Mesh (FRITZ!OS 6.90 or higher). This box is the Mesh Master.
  • The FRITZ!Box to be deployed as a Mesh Repeater has been updated to FRITZ!OS 7.0 and you have restored its factory settings. This box is to become the Mesh Repeater.

Here's how:

  • Connect the "LAN 1" port of the Mesh Repeater with the Master using a LAN cable
  • Initiate the Connect function on both boxes (7590: press the "Connect" button briefly; 7490: press and hold down the "WLAN/WPS" button for 6 seconds)

After the connection procedure is concluded, the second FRITZ!Box is ready for operation as a Mesh Repeater. (It operates in "IP client" mode and, as a Mesh Repeater, adopts the wireless LAN settings and other important settings from the FRITZ!Box).

Please note that this function can be used only if the second FRITZ!Box is permanently connected with the first box by LAN cable.

Instructions for configuring a FRITZ!Box connected via wireless LAN as a Mesh Repeater are presented at

Additional Innovations in FRITZ!OS 7.0

New features for the FRITZ! Hotspot

The new FRITZ!OS 7.0 makes setting up and using the FRITZ! Hotspot even easier. It's now even easier for users to choose whether the wireless guest access should be provided as an open hotspot, or encrypted as a private hotspot. If an open hotspot is chosen, the guests do not need to enter a security key. Cafés, medical practices and small businesses, as well as all FRITZ!Box users, can provide their customers and visitors an easy-to-use internet access that complies with the current legal regulations. Whether it's private or public hotspot, guests cannot access the home network, but surf using a second wireless LAN provided by the FRITZ!Box.

Secure and Complete Control

The operator of the hotspot can decide which applications can be used in the guest network and which are prohibited. Daily email messages notify the operator of the hotspot about which devices were registered in the radio network and when. Another advantage is the option to reserve bandwidth. This options allows you to specify how much of the data rate is reserved for your own wireless LAN and how much is available to your guests.

Individual & Convenient

The Welcome page of the FRITZ! Hotspot offers additional convenience. Cafés or businesses can greet their guests with a short welcome text, photo or logo. If desired, the guests can also be requested to consent to the terms of use for the hotspot. The hotspot is also available in locations where FRITZ!WLAN Repeaters or powerline devices supporting WiFi provide for better coverage.

MyFRITZ! access to your FRITZ!Box via internet now comes without a security warning in the browser

When you access the user interface of your FRITZ!Box from the internet, a security warning may be displayed in the browser. The new FRITZ!OS version enables your FRITZ!Box to receive a SSL certificate for your MyFRITZ! address from the organization Browser access via the MyFRITZ! address to the interface of FRITZ!Box is no longer accompanied by a security warning, since most browsers trust the certificates from

Proceed as follows:

  1. First you need to register your FRITZ!Box with MyFRITZ! (
  2. Enable the option "Let's encrypt" at "Internet / MyFRITZ! Account".
  3. Confirm by clicking "Apply" and wait for the status "Certificate issued successfully".

Your FRITZ!Box has the certificate created for your MyFRITZ! address and uses it for browser access to this address, for example when you access your FRITZ!Box via your account on

It's also possible to send links for FRITZ!NAS file sharing (for example photos) to third parties, who'll have access without annoying certificate warnings. This way, FRITZ!NAS becomes an even better alternative to cloud storage services.

Notes: To receive the certificate, the TCP port 443 of your FRITZ!Box is open for a few minutes. The certificate is currently valid for 60 days and is then renewed by the FRITZ!Box. HTTPS access to your FRITZ!Box via public or local IP address, "" in the home network or over a DynDNS provider do not use the certificate from letsencrypt. MyFRITZ!App: After activation of the Let's Encrypt certificate in the FRITZ!Box, the MyFRITZ!App notifies you once about the change in certificate fingerprint. Select "trust" to continue using the new certificate.

New and improved Features in FRITZ!OS 6.83


  • NEW: Option for loading the previous LTE modem software
  • NEW: New software version for the LTE modem
  • NEW: TR069 query parameters supported for LTE connection
  • NEW: Text reception supported -- texts received output as event


  • 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

Home network

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



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


  • NEW: Certain settings and features require additional confirmation by the user where the FRITZ!Box is located

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.

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 their FRITZ!Box - at home and from anywhere else. 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.

On the safe side: strong passwords and settings requiring confirmation The saving of backup files and the changing of certain settings are 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. 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.

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 6.80.

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: Better error handling upon attach


  • 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

Home network

  • Improved: Display of device details completed Remedied: "Deleting" unused devices in the home network list also removes VPN connections

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
  • Improved: Better stability


  • 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 Change: Registration 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: 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 function diagnostics
  • Improved: Important notifications for secure and reliable operation now also via MyFRITZ!App 2 and by push service mail (Previously: only red Info LED and overview)
  • Improved: Better stability even in atypical load situations
  • Bug fix: Recurrent push mails (change notices) about first registration of powerline devices or devices without a clock Change: Interface descriptions for developers expanded (

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".

New in FRITZ!OS 6.51


  • NEW: in the initial setup of the Internet connection is first attempts to establish a connection to an LTE cell

Improvements and Bug Fixes in FRITZ!OS 6.51


  • Improved: new modem firmware with improved connection stability

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: 7-day statistics added for mobile communications connection
  • NEW: Mobile radio modem displayed separately in the Energy Monitor
  • NEW: Real-time monitor also available for UMTS and GSM
  • NEW: Provider name from the PNN field of the SIM card also considered


  • 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: Option for granting Internet access via the guest access only after consent to terms of use (captive portal)


  • 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: Check for available firmware update at conclusion of first configuration

Improvements and Bug Fixes in FRITZ!OS 6.50


  • Resolved: PUK/PIN entry after three incorrect attempts corrected
  • Improved: New modem firmware
  • Improved: Detection and handling of errors in mobile communication connection
  • Resolved: Error during network search in the context of some 2G-only SIM cards
  • Resolved: Information on second DNS server was not transmitted from the LTE modem to FRITZ!OS
  • Resolved: Connection status sometimes unclear after an existing connection switched to UMTS


  • Change: Roaming option moved from "Advanced" to "Standard" view
  • Resolved: Internet connections not possible when PPP authentication required
  • Resolved: No function for IPv6
  • Resolved: Prioritizations could not be created
  • Resolved: After reboot, LAN traffic sometimes not forwarded to the WAN via the correct route


  • Improved: Increased wireless throughput
  • Resolved: Incorrect settings dialogs and displays in the Wireless configuration and in the Wireless Monitor
  • Resolved: Occasionally only half of the wireless throughput actually possible achieved on certain channels
  • Improved: Check for 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
  • Resolved: Configuration error eliminated when guest AP enabled

Home network

  • Improved: Various optimizations in the views of the home network overview
  • Resolved: Fixed assignment of the same IPv4 address lost on restart


  • Change: Update with a FRITZ!OS file is permitted only with the latest version of FRITZ!OS
  • Resolved: Language selection in first configuration not applied in password dialog
  • Resolved: "Poland" missing as country in country selection
  • Resolved: Push mail did not contain consumption graph
  • Resolved: Firmware update sometimes failed when wireless LAN enabled

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".

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?2018. 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. Licensee shall be entitled to make a copy exclusively reserved for personal backup purposes (backup copy). AVM reserves all intellectual property rights except as expressly granted herein. 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 2018/11/30