Note: Master resetting your Nokia 6288 firmware will delete all your settings, stored contacts and messages. So i suggest you make a back up of all your valuable content before you reset. Factory resetting does not remove security codes, you have to flash if you want to remove it.
1)Firstly, switch on the Nokia 6288 mobile phone. Once its landed on the user menu interface, enter the following master reset code: *#7780# into the phone's keypad.
2)Confirm you are sure about the reset to continue.
3)Wait for the Nokia 6288 to reset itself to factory settings, approximately it will take about 3-4 minutes.
4)That's it! The phone will switch back on automatically and will be successfully reset.
good post
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