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Knowledge document #158

Cannot update FRITZ!OS: Error message after selecting a FRITZ!OS file

The update for the FRITZ!Box cannot be installed. After you select the file in the FRITZ!Box user interface, one of the following error messages is displayed:

  • "The update failed: The specified file does not contain any valid firmware for your device."
  • "The update failed. An unspecified error occurred during the update."

1 Downloading the FRITZ!OS file again

  1. Call up download.avm.de/fritzbox/ in your web browser.
  2. Switch to the folder "fritzbox-7360-v1" or "fritzbox-7360-v2", then to the subfolder "other", and then to the folder "fritz.os".

    Important:You can find the version number in the user interface of the FRITZ!Box under "System > Update" on the "FRITZ!OS File" tab. If the tab is not displayed, enable the Advanced View first. The number for v1 begins with 111., and the number for v2 begins with 124.

  3. Download the file with the extension ".image" to the computer.

2 Restarting the FRITZ!Box

  1. Click "System" in the FRITZ!Box user interface.
  2. Click "Backup" in the "System" menu.
  3. Click on the "Restart" tab.
  4. Click the "Restart" button.

3 Repeating the update process

  1. Click "System" in the FRITZ!Box user interface.
  2. Click "Update" or "Firmware Update" in the "System" menu.
  3. Click on the "FRITZ!OS File" or "Firmware File" tab. If the tab is not displayed, enable the Advanced View first.
  4. Click "Save Settings".

    Note:Save your FRITZ!Box settings again under "System > Backup" right after successfully completing the installation. Then you can always restore a working configuration.

  5. Click the "Browse..." or "Choose File" button.
  6. Select the FRITZ!OS file you downloaded (image file).
  7. Click the "Start Update" button.
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