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FRITZ!  OS 7.26-89026 FRITZ!  Lab is available for Box 6890

FRITZ! OS 7.26-89066 FRITZ! Labs are available for the Box 6850

Fritz! Fritz for the Box 6850 LTE! AVM has released new laboratory firmware for OS 7.26-89066. This update includes bug fixes and improvements in the fields of cellular communications, Internet, WLAN, telephone and computer, which can be found below. Fritz! Fritz for the Box 6850 LT! You can download and test the update for OS 7.26-89066 now. Users update of laboratory version FRITZ! Box can be downloaded via the user interface. FRITZ! Open the box -> Enter the in the browser and sign in -> Click on Helpers -> Update -> Start the update by clicking New FRITZ! Search for OS New FRITZ! Follow the instructions to get the OS. If the update does not work, FRITZ! FRITZ using OS file! There is an alternative way to update the box. More information about this update can be found below or at AVM.

Download -> Download FRITZ! OS 7.26-89066 FRITZ! Box 6850 LTE

The new firmware can be downloaded from the following AVM website:

  • FRITZ! FRITZ for OS 686 LTE! Download OS 7.26-89066
    Attention: This lab firmware is only suitable for FRITZ! Box 6850 LTE!
    Website ->

FRITZ! FRITZ from OS 7.26-89066! Further improvements from Box 6850 LTE

Cellular ->

  • Change – Initial setup process for provider payment “Home telecommunications via radio” has been revised.
  • Fixed – Fixes in the initial setup process (Automatic detection of mobile network provider charges has failed in some constellations).
  • OK – a FRITZ with a pre-configured web provider! With the box, the initial setup process is not working properly.
  • OK – Due to the ‘automatic’ setting for the cellular type, the configuration of the cellular bar cannot be changed in some cases.
  • OK – Sending SMS leads to dual entries in SMS magazine.
  • OK – No action was taken to send another SMS to the same recipient for the entries in the SMS magazine to the sent SMS.
  • Fixed – SMS push mail contains incorrect date and time information.
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Internet ->

  • Fixed – When using cellular charges with a standard IPv6 address, no connection status is displayed on the overlay page.
  • OK – In case of provider charges for slow or parallel operation, the TR069 service will sometimes not switch to the secondary interface if the primary Internet connection fails.


  • Improvement – Increased stability.

Phone ->

  • Fixed – Lua error when deleting some phone numbers.

System ->

  • Improvement – Increased stability.

FRITZ! Notes on Laboratory Update for Box

These Fritz! The lab version is in beta. It was tested in a stable environment before it was released, but it may crash. AVM assumes no responsibility for damages resulting from the use of this version. You can use FRITZ at any time using the recovery.exe included in this lab kit! Box Official FRITZ! Can be changed to OS.

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