Reset your N81 phone
There is two way to reset you N81 phone, either use Tools>Settings>General>Factory settings to reset to factory setting or you can reset to format which is erasing everything in the phone and revert back to the original setting.
To format just key *#7370# and it will ask for security code. The default code is 12345
N81 codes
*#06# ………… IMEI number (International Mobile Equipment Identity)
*#0000# ……… Firmware version and date, Phone Model and Operator Variant
*#92702689# … Life timer (W A R 0 A N T Y) – Total time your phone has spent sending and receiving calls.
*#62209526# … Wireless MAC Address (M A C _ W L A N)
*#2820# ………. Bluetooth MAC address (B T A 0?)
*#7370# ………. Format phone (R E S 0 ?)
*#7780# ………. Factory Reset (R S T 0 ?)
Note:
Format phone restores phone to as if it was out of the box. Retains firmware version and operator Variant changes but wipes all applications you have installed. Does not format the memory card so any apps on there may reinstall once powered back up again.
Factory Reset resets all settings to defaults but keeps any applications you have installed and photos etc. Both need the Security code, which, by default, is 12345.
Another way to format some symbian phones: Power off phone. Press and hold Green, * and 3 and keep them held
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