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.
- Formatting the device will permanently erase all user data and settings as well as add-on applications and operator specific settings.
- If you have made a backup of the device data, the data can be restored from the backup after formatting but some add-on applications can have restrictions that they are not restored from the backup.
- If you use formatting to repair faulty behavior of the device, restoring the backed-up data files may restore the unwanted behavior as well. In that case, a partial restore may resolve the situation.
- The contents of the SIM card and memory card (MMC) are not erased during formatting. Note, however, that in some device models (e.g. Nokia N8-00 and E7-00 ) the mass memory is formatted in this situation and it is therefore important that you have backed up all the data from your mass memory (E: mass memory) before resetting the device.