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Knowledge document #3383
FRITZ!Box 7272
This support document is available for the following products:
- FRITZ!Box 7590 AX
- FRITZ!Box 7590
- FRITZ!Box 7583 VDSL
- FRITZ!Box 7583
- FRITZ!Box 7582
- FRITZ!Box 7581
- FRITZ!Box 7560
- FRITZ!Box 7530 AX
- FRITZ!Box 7530
- FRITZ!Box 7520
- FRITZ!Box 7510
- FRITZ!Box 7490
- FRITZ!Box 7430
- FRITZ!Box 7390
- FRITZ!Box 7360
- FRITZ!Box 6890 LTE
- FRITZ!Box 6850 5G
- FRITZ!Box 6850 LTE
FRITZ!Box reports "Username already used"
It is not possible to delete entries for IP telephones, for example FRITZ!App Fon, from the list of telephony devices. When you try to, the following error message is displayed:
"An error occurred. Error description: Username already used. Please enter your data again. If the error occurs again, please consult AVM Support."
Cause
- The FRITZ!Box's telephony settings are inconsistent.
Note:All instructions on configuration and settings given in this guide refer to the latest FRITZ!OS for the FRITZ!Box.
1 Saving settings
- Click "System" in the FRITZ!Box user interface.
- Click "Backup" in the "System" menu.
- Click on the "Save" tab.
- Enter a password.
- Click "Save" and on the FRITZ!Box, confirm that the procedure may be executed if asked to do so.
- Save the file "FRITZ.Box[...].export" on your computer.
2 Loading the factory settings
- Click "System" in the FRITZ!Box user interface.
- Click "Backup" in the "System" menu.
- Click on the "Factory Settings" tab.
- Click the "Load Factory Settings" button.
3 Restoring settings
Now you can restore all of the settings except for the telephony settings. Afterwards, you must manually reconfigure the telephony functions:
- Click "System" in the FRITZ!Box user interface.
- Click "Backup" in the "System" menu.
- Click on the "Restore" tab.
- Click the "Browse..." or "Choose File" button.
- Select the file "FRITZ.Box[...].export" with the settings you want to restore.
- Enter the password you entered when saving the file.
- Enable the option "Select manually the settings to be restored".
- Click the "Restore" button and on the FRITZ!Box, confirm that the procedure may be executed if asked to do so.
- Enable the option "Select all settings".
- Disable the option "Overwrite all telephony and Smart Home settings".
- Click "Apply".