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Knowledge document #541
This support document is available for the following products:

Installing the latest FRITZ!Fon software

AVM provides free updates for the FRITZ!Fon on a regular basis that add new functions to the telephone. You can easily install the latest software using the FRITZ!Fon menu.


  • The FRITZ!Fon must be registered with a FRITZ!Box.

1 Preparations

The software version indicated by your telephone depends on the version of FRITZ!OS installed on the FRITZ!Box:

  1. Install the latest FRITZ!OS on the FRITZ!Box.

2 Installing the latest software

  1. Press the "Menu" key on the telephone.
  2. Scroll to "Settings" and press "OK".
  3. "Firmware update" or "Software update" > "OK"
    • The telephone checks for a new version.
  4. If a new version is found, press "OK".
    • Now the new software is transmitted to the telephone. The update is complete after the telephone has restarted.