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Home » Technology » Preview of Fritz!OS 7.50: Updates for the 7590, 7590 AX, 7530, 6690, 6591 & 6660

Preview of Fritz!OS 7.50: Updates for the 7590, 7590 AX, 7530, 6690, 6591 & 6660

AVM has released new lab firmware for Fritz! Boxes 7590, 7590 AX, and 7530 for DSL and the 6690, 6591, and 6660 Cable for testers like Fritz!Labor giving a preview of the next major release Fritz! OS 7.50 must. The new release includes optimizations for WireGuard and setting up fax machines.

New Fritz! Laboratory for DSL and Cable Routers

After a total of eight ADSL, VDSL, and cable routers from the Fritz! Box series was equipped with the latest laboratory firmware, Fritz! Labor 7.39, AVM has released another update for six of these models, as well as a corresponding product update. It will continue to work under version 7.30. The latest preview of Fritz!OS 7.50, which will be released later this year, is already available for the Fritz! Repeater 2400. Fritz!OS 7.39 as a preview of Fritz!OS 7.50

  • Fritz!Repeater 2400 → v07.39-96551
  • Fritz! Box 6690 Cable → v07.39-96972*
  • Fritz! Box 6660 Cable → v07.39-96971*
  • Fritz! Box 6591 Cable → v07.39-96970*
  • Fritz!Box 6890 LTE → v07.39-96061
  • Fritz!Box 6850 LTE → v07.39-96343
  • Fritz!Box 7590 AX → v07.39-96976*
  • Fritz! Box 7590 → v07.39-96975*
  • Fritz! Box 7530 → v07.39-96974*

*) Latest release According to the official release notes, the latest preview of AVM’s router operating system of the future includes the following innovations, optimizations, and error corrections in the areas of the system, interface, DSL, Internet, WLAN, and repeaters:


  • [Verbesserung] Initial setup wizard with option to send faxes or send and receive faxes
  • [Verbesserung] The email address stored in the user account can be deleted


  • [Verbesserung] Display of the synchronization data rate instead of the available data rate on the “Overview” and “Online Monitor” pages


  • [Behoben] Failed ISP logins were not reported in the event log
  • [Behoben] In very rare cases an update was no longer requested and the information on the Mesh Master was not transferred to MyFRITZ!Net
  • [Behoben] In rare cases, the email notification of a successful update via the MyFRITZ! platform was not sent
  • [Behoben] NTP timing was not possible without an ISP DNS server
  • [Behoben] Under certain circumstances, the update of the filter of the “Federal Inspectorate for Media Harmful to Young People” (BPjM) failed.
  • [Behoben] WireGuard VPN connection between dual stack and DS-Lite connection is sometimes permanently lost
  • [Behoben] “Internet address of this FRITZ!Box” was sometimes not displayed for WireGuard connections
  • [Behoben] In very rare cases an update was no longer requested and the information on the Mesh Master was not transferred to MyFRITZ!Net
  • [Verbesserung] With VPN connections, Internet access may be prevented by parental controls


  • [Behoben] Fixed throughput issues with 160MHz channel bandwidth (5GHz band) with some Huawei devices (including Mate 20 Pro, P30 (6591, 7590))
  • [Behoben] The “Start WPS” button on the “WLAN / Security / WPS Quick Connection” page had no function
  • [Behoben] In certain scenarios, WLAN cannot be activated or deactivated sporadically via FRITZ!Fon
  • [Verbesserung] improved automatic channel selection on the 5 GHz band in case of radar interference (7530)


  • [Verbesserung] Larger text in many tables
  • [Verbesserung] Changed the behavior of the buttons at the bottom of the page


  • [Behoben] Multiple DFS wait times after initial installation

Fritz!OS 7.39 Release Notes

The model’s Fritz!Box 6890 LTE and Fritz!Box 6850 LTE as well as the Fritz!Repeater 2400 will probably be updated with the latest firmware in the near future. AVM has not yet definitively answered whether other models for the final Fritz!OS 7.50, which, according to the manufacturer, should be on the market this year, will be discussed in due course.

Fritz!Labor is officially a beta

Experienced and users can, as usual, directly through the website of Frits! laboratory get a first impression of the upcoming Fritz!OS 7.50. A certain instinct and a little experience can’t hurt here either, and in a productive work environment, a beta version should be used only in the rarest of cases. If your own Fritz!Box is equipped with the latest stable Fritz!OS, for the Fritz!Box 7590 AX for example Fritz!OS 7.31, you can start installing the current lab version according to AVM’s instructions.

  • Read and confirm the displayed message.
  • Click “Download” and save the file to your computer.
  • Extract the lab file (*.zip).
  • Carry out the update via the FRITZ!Box user interface and select “View: Advanced” in the footer.
  • Select “System / Update” from the menu.
  • Select the “FRITZ!OS File” tab. Save the settings of your FRITZ!Box.
  • Then enter the name of the lab version and the path in the input field (for example, C:Documents and SettingsUsernameDesktopFRITZ!Box-Labor-xxxx.image).
  • Click on “Start Update”.
  • Follow the instructions on the screen.

Instructions for installing Fritz! laboratory

The editors’ Fritz!OS overview provides an overview of the current status of the firmware for all AVM routers.

  • Fritz!OS: All current firmware versions at a glance

An announcement: The lab versions are always in beta status and have been tested by AVM in standard environments before publication, but may lead to malfunctions. The manufacturer expressly assumes no liability for any damage resulting from the use of laboratory versions. Users can switch back to the official Fritz!OS at any time via System → Update → Fritz!OS Version.