All configuration changes on the phone will be erased. All local phone book entries will get lost.
Reset your Phone via "Phone User Interface"
Press **## to reboot.
Long press # while the phone boots up in "Rescue Mode"
Chose Option 1 "Settings reset"
This method is useful if you lost the admin mode password
Reset your Phone via "Web user interface"
If you have access to the phone web user interface, and you are able to switch your phone to admin mode, you can factory reset the phone by going to the section Advanced → Update and the press Reset button.
The Snom Phone will now reset all settings and reboot.
Older Snom Phones
To set the phone back to "Admin mode", press the Settings key .
Firmware versions lower than 7.X: Select "Admin Mode".
Firmware versions lower equal or greater 7.X: Enter "Maintenance" and select "Admin Mode".
On the prompt enter your administrator password, if you have set one, or the default password, which is "0000" (four zeros), and confirm.
Reset lost administrator password by performing a reset to factory defaults (Warning: All configuration changes get lost!) via Web User Interface (Note: This will work only when the web user interface is not secured by a password):
Obtain your phone's IP address and currently used firmware version by pressing the Help button on your snom 3x0
Open any web browser and choose the URL corresponding to your current firmware version: