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Important updates for DSL and cable Fritzboxes now available

The Berlin router manufacturer AVM regularly releases updates for its Fritzboxes and other Fritz devices. This includes repeaters, powerline adapters, but also Fritz phones. atechbook has the information about the latest updates.

AVM has a whole range of different devices on offer, most of which have been supplied with new firmware updates for years. The updates bring numerous innovations for the Fritzboxes, repeaters and powerline adapters, but often also solve minor problems. In the run-up, the company usually prepares the so-called release candidates for the current major Fritzbox update by means of a laboratory. New functions also continue to be tested through smaller updates from the Fritz lab. Here you can find out for which devices AVM currently offers an update.

Please note:

In the list, we include updates to the official Fritz!OS as well as the latest lab versions. Since AVM is only testing new features in the Fritz Lab, the software may cause minor problems in operation. Therefore, please pay attention to the notes we give on installing a Fritz Lab.

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Current Fritzbox updates at a glance

Fritzbox 4040 gets Fritz!OS 7.30, cable Fritzboxes a new lab

AVM has officially rolled out the latest update for the Fritzbox 4040. The DSL router gets the upgrade to Fritz!OS 7.30 and along with it minor improvements as well as optimizations that benefit security and system stability. For example, AVM has expanded compatibility with DECT phones from other manufacturers.

New software is also available for the cable Fritzboxes 6690, 6591 and 6660 Cable. However, this comes from the lab, so may contain minor errors that users can report to AVM. The updates have the version numbers 07.39-96594, -96595 and -96596, but do not differ in content. The changelog of the current lab is extensive and includes adjustments in the areas of Internet, WLAN and home network as well as the system, USB and the cooperation with repeaters. AVM lists the following innovations in detail:


  • Fixed IPv6 was active for older mobile sticks and therefore no internet connection was possible
  • Improvement An existing WireGuard VPN client can be extended with new connections
  • Improvement VPN user dial-in from Android 12 via IPSec IKEv2 supported
  • Improvement Random selection of the port used for WireGuard VPN connections as well as extension of the selection range


  • Fixed WLAN / wireless network page was not completely visible when using web browser “Safari” in macOS/iOS/ipadOS
  • Improvement Radar detection improved (5 GHz band)
  • Improvement WLAN autochannel function improved

Home network:

  • Fixed missing of frequency spectrum for devices in powerline network which were connected to FRITZ!Box via powerline
  • Change Revision of the “detail” pages for Fritz Powerline devices


  • Improvement WireGuard setup improved


  • Fixed Folder selection for the media server was not possible because the “OK” button remained grayed out


  • Fixed Under certain conditions, the WLAN channel was changed too frequently in the 2.4 GHz band
  • Fixed WLAN switch-off was not transferred to mesh repeaters if mesh settings transfer was switched off

The new features in the current FritzOS

With the latest Fritz!OS, AVM says it delivers numerous new functions and optimizations for its Fritz devices. These should not only increase the performance of the Fritzboxes, but also improve WLAN connections from mobile devices, enable faster and more stable connections via VPN networks, and provide more security in the home network. Overall, AVM is introducing innovations in all core areas such as Internet, telephony, smart home and home network.

Read the linked news item to find out which adjustments and features are included in the update to Fritz!OS 7.25 and higher.

Fritz Lab: What you need to know

If an update comes from the Fritz Lab, different conditions apply compared to the official updates. This is because AVM uses the lab firmware to test new functions that will later become part of the large, official firmware update at the end of August or beginning of September. It therefore has beta character. The manufacturer also points out that there may be problems when operating the software.

Users can try out a Fritz Lab if the current FritzOS is installed on their Fritzbox. Before installing the software, however, the data and settings on the router should be backed up to be on the safe side. Once this has been done, users can download the Fritz Lab firmware from AVM’s website and save it on their computer as a ZIP file. After unpacking the file, the following steps are then necessary for installation:

  1. Call up the Fritzbox interface in the browser with and enter the password for your Fritzbox if necessary.
  2. At the bottom of the menu you will find the footer “View: Advanced”, which you have to activate
  3. Now you will find the tab “FritzOS file” under “System / Update”.
  4. Select the path to the previously downloaded and unzipped ZIP file in the input field and click on “Start update”.

If a lab firmware is already installed on the Fritzbox, a new update will be offered automatically. Note that the update process may take a few minutes. During this time, the router’s info lamp flashes. Once the update is complete, the Fritzbox restarts automatically. Data and settings are not lost, so the router is ready for use again as usual.


  • Fritzbox