Nokia 2600 hard resetGo to Menu > Settings > Reset device > select Restore all (You can select Restore settings only if you wish to restore only settings)
You will see a warning message
Allows you to restore settings and delete personal data. Select Contin. by pressing center key.
You can format your Nokia 2600 device by typing: * + 3 + call + Power on. Before the device is reset, you need to provide the lock code. The default lock code is 12345.
If it is not working try this code:
You can format your device by typing *#7370# in standby mode. Before the device is reset, you need to provide the lock code. The default lock code is 12345.
Some Nokia phone can be reset via this menu option
Press menu button or enter Menu > Settings > Phone > Phone management > Factory settings > Delete data and restore > YES
Formatting the device will permanently erase all user data and settings as well as add-on applications and operator specific settings.