How to reset Nokia phone to factory setting

Resetting Nokia phone can you use to remove virus in internal memory. It will reset all setting and remove anything file included on internal memory. So, before reset the phone you should to backup the contact and SMS. To backup SMS you can save the exist SMS in external memory. For the contact, you can save existing contact on SIM memory. If there are plenty of contact and SMS, you can backup them on your PC. Now you’re ready to reset your phone.
To reset phone into factory setting, there is 3 way can you use.

1. Reset by phone configuration/setting

Just go to configuration or setting. Select reset or restore to factory settings. Every phone has different place to resetting the phone. Then insert your phone security code. It usually is 12345 or 00000(zero)

2. Use Secret code
The secrets code is

*#7370#

Type numbers above and insert phone security code. Ok now finiched.

3. Hard reset
Hard reset can be done if you forgoten your phone security code. Hard reset only can used on s60 phone. To do a hard reset code you need to turn off your phone. Now press and hold 3 keypads bellow

*, call button, and 3

Just hold 3 keypad bellow. And now press the power button. you can ask for your friend to press the power button.

Now your phone back to factory setting. You need to restore all contact and SMS to completed the reset. Have fun..