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Fresh from Development

This FRITZ! Lab contains new functions from our development department and offers a sneak preview of the upcoming FRITZ!OS 8.50: It serves as the basis for new functions in the MyFRITZ! App and prepares the FRITZ!Box for this app. The security architecture of FRITZ! products has also been further optimized. Switching to a new FRITZ!Box is easier, and there are new features for telephony.

In coming months the FRITZ! Lab will add additional features and improvements in many areas and be made available for additional FRITZ!Box models.

New features at a glance

  • Overload switching for the FRITZ!Smart Energy 200 and 210 smart plugs
  • Smart home routines now support multiple triggers
  • New ‘Simple Mode’ for the FRITZ!Fon brings simplified operation and an SOS call
  • DNS queries from the home and guest networks can be filtered using specified filter lists [more]
  • New prioritization feature automatically ensures the best possible connection [more]
  • Smart Check shows the current status of the FRITZ!Box in the MyFRITZ!App and outputs notifications and recommendations [more]

The ‘New / Improvements’ section has a complete list of all updates, improvements, and changes in this Lab.

Installation on the FRITZ!Box

You're not using the current FRITZ!OS in your FRITZ!Box yet? Then first update FRITZ!OS to the latest release version. Here we tell you how this works.

Once your FRITZ!Box has the latest FRITZ!OS installed you can start installation of the lab version.

  1. Read and confirm the information displayed.
  2. Click on ‘Download’ and save the file on your computer.
  3. Unpack the lab file (*.zip)
  4. Use the FRITZ!Box user interface to install the update:
  5. Select the ‘System / Update’ menu.
  6. Select the ‘FRITZ!OS file’ tab. Back up the settings of your FRITZ!Box.
  7. Select the lab version that matches your FRITZ!Box model (e.g. C:\Documents and Settings\Username\Desktop\FRITZ!Box-xxxxxx-Lab.image).
  8. Click on ‘Start Update’.
  9. Follow the instructions displayed on the screen.

During the update process the ‘Info’ LED on your FRITZ!Box will flash. The LED goes out once the update is complete. Please be patient, as this process may take several minutes. As soon as the update has been completed, the FRITZ!Box restarts and is then ready for operation.

Important

This FRITZ! Lab version is a beta. Please note the terms of use and the data protection statement for our products.

You can switch back to the official FRITZ!OS at any time under ‘System > Update > FRITZ!OS Version’.

Please also note the information about the use of lab versions in the infolab.txt. It is contained in the lab file (*.zip).

Here you'll find the download package for starting in the FRITZ! Lab. After the installation you'll receive updates via the automatic update function.

FRITZ!Box Fiber

FRITZ!Box - freigestellt mit transparentem Hintergrund

FRITZ!Box 5690 Pro

Download information:
Version: 8.40-135932
Date: 28/08/2026

FRITZ!Box 5690

Download information:
Version: 8.40-135929
Date: 26/08/2026

FRITZ!Box - freigestellt mit transparentem Hintergrund

FRITZ!Box 5590 Fiber

Download information:
Version: 8.40-135922
Date: 28/08/2026

With the download and use of the FRITZ! Lab you consent to the Terms of Use for the FRITZ! Lab.

Information: Here is the Data Protection Statement for FRITZ! Products and the use of the FRITZ! Lab.

FRITZ!Box DSL

FRITZ!Box - freigestellt mit transparentem Hintergrund

FRITZ!Box 7690

Download information:
Version: 8.40-135973
Date: 27/08/2026

FRITZ!Box - freigestellt mit transparentem Hintergrund

FRITZ!Box 7630

Download information:
Version: 8.40-135966
Date: 27/08/2026

FRITZ!Box - freigestellt mit transparentem Hintergrund

FRITZ!Box 7590 AX

Download information:
Version: 8.40-135961
Date: 27/08/2026

FRITZ!Box 7590

Download information:
Version: 8.40-135958
Date: 27/08/2026

FRITZ!Box - freigestellt mit transparentem Hintergrund

FRITZ!Box 7530 AX

Download information:
Version: 8.40-130620
Date: 27/08/2026

With the download and use of the FRITZ! Lab you consent to the Terms of Use for the FRITZ! Lab.

Information: Here is the Data Protection Statement for FRITZ! Products and the use of the FRITZ! Lab.

FRITZ!Box Cable

FRITZ!Box - freigestellt mit transparentem Hintergrund

FRITZ!Box 6690 Cable

Download information:
Version: 8.40-136021
Date: 26/08/2026

FRITZ!Box - freigestellt mit transparentem Hintergrund

FRITZ!Box 6670 Cable

Download information:
Version: 8.40-136022
Date: 26/08/2026

FRITZ!Box - freigestellt mit transparentem Hintergrund

FRITZ!Box 6660 Cable

Download information:
Version: 8.40-136019
Date: 26/08/2026

Mit dem Download und der Verwendung des FRITZ! Labors stimmen Sie den Nutzungsbedingungen für das FRITZ! Labor zu.

Information: Hier finden Sie die Datenschutzerklärung für die FRITZ!-Produkte und die Verwendung des FRITZ! Labors.

FRITZ!Box for Modem/Network

FRITZ!Box - freigestellt mit transparentem Hintergrund

FRITZ!Box 4690

Download information:
Version: 8.40-135919
Date: 27/08/2026

FRITZ!Box - freigestellt mit transparentem Hintergrund

FRITZ!Box 4050

Download information:
Version: 8.40-135913
Date: 27/08/2026

With the download and use of the FRITZ! Lab you consent to the Terms of Use for the FRITZ! Lab.

Information: Here is the Data Protection Statement for FRITZ! Products and the use of the FRITZ! Lab.

FRITZ!Repeater

FRITZ!Repeater 6000

Download information:
Version: 8.40-136003
Date: 28/08/2026

FRITZ!Repeater 3000 AX

Download information:
Version: 8.40-135996
Date: 28/08/2026

FRITZ!Repeater 1200 AX

Download information:
Version: 8.40-135985
Date: 28/08/2026

With the download and use of the FRITZ! Lab you consent to the Terms of Use for the FRITZ! Lab.

Information: Here is the Data Protection Statement for FRITZ! Products and the use of the FRITZ! Lab.

FRITZ!Mesh Set

FRITZ!Mesh Set - freigestellt mit transparentem Hintergrund

FRITZ!Mesh Set 1600

This FRITZ! Lab download is exclusively designed for FRITZ!Repeaters from a FRITZ!Mesh Set (2-pack or +3-pack).

Download information:
Version: 8.40-135988
Date: 28/08/2026

With the download and use of the FRITZ! Lab you consent to the Terms of Use for the FRITZ! Lab.

Information: Here is the Data Protection Statement for FRITZ! Products and the use of the FRITZ! Lab.