Nokia 6600 hard reset
There are 2 ways to do a factory reset on your Nokia 6600 phone.
The first methode is a soft-format code for Series 60 phones is *#7370# . Enter this code in the dial phone screen.
It performs a format of the Internal drive - All data will be lost!You must use a valid SIM card to enter the phone dial screen. Make a back up before doing a full reset of your 6600 phone.
Nokia 6600 hard reset using keys / buttons. Little bit difficult, but it works!
Master reset Nokia 6600
The method of performing a hard-format, i.e resetting it completely to factory defaults and removing all data, is as follows:
1. Switch off the phone.
2. Hold down the following three buttons: Green (call answer) button, * button, and '3' button
3. While holding these buttons, press the power button and switch on the phone
4. When the message 'Formatting' appears on the screen, release all of the buttons. It will take about 2-4 minutes! Phone will reboot! Do not power off your device until phone reboot. Insert SIM card message or if you have inserted SIM and PIN code enabled until that message.
Note: There is no need to insert any SIM card to do this Nokia 6600 hard reset format using buttons.