FRITZ!Fon MT-F – Service - Knowledge Base

FRITZ!Fon MT-F – Service
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FRITZ!Fon suddenly turns off or suddenly restarts

FRITZ!Fon suddenly turns off or suddenly restarts

Simply proceed as described below. After each measure, check whether the issue persists.

1 Installing the latest software for your telephone

2 Recharging the telephone battery

  • Fully charge the telephone battery. Leave the telephone in the charging cradle for at least 12 hours.

3 Resetting the telephone and re-registering all telephones

The issue may be caused by inconsistent settings in the FRITZ!Box or the FRITZ!Fon (for example due to repeatedly registering and de-registering the telephone or after updating the software). Therefore, restore the relevant FRITZ!Fon to factory settings and then use the Wizard for telephony devices to re-register all cordless telephones to the FRITZ!Box:

Deleting telephones

  1. Click "DECT" in the FRITZ!Box user interface.
  2. Click "Cordless Telephones" in the "DECT" menu.
  3. Click the corresponding button (Delete) to delete all of the cordless telephones that are registered.

Restoring the telephone to its factory settings

  1. Press the "Menu" key on the telephone.
  2. Scroll to "Settings" and press "OK".
  3. "Reset" > "OK" > "OK"

Turning telephones off

  • Turn all of the cordless telephones off.

Restarting the FRITZ!Box

  1. Click "System" in the FRITZ!Box user interface.
  2. Click "Backup" or "Reset" in the "System" menu.
  3. Click on the "Restart" tab (if available).
  4. Click the "Restart" button.

Re-registering all telephones

4 Replacing the rechargeable battery

If the issue persists despite trying all of the measures in this document, then the rechargeable battery is defective. Therefore, replace the battery:

Within the first 12 months after purchasing FRITZ!Fon, we will send you a replacement battery free of charge if you send us the defective battery along with a copy of your proof of purchase (with sufficient postage) to the following address:

Important:AVM will not be liable for any damages that arise during transport. Therefore, send the battery in a padded envelope, for example.

AVM Customer-Service
Kleinteileversand
Alt-Moabit 95
10559 Berlin
Germany

After the first 12 months have elapsed, you can purchase a new rechargeable battery from specialized vendors or purchase one from AVM's Small Parts Department for 9.90 € plus postage.

Note:Batteries constitute expendable material, which is not covered by the warranty (see also the warranty conditions in your manual).