Formatting a Nokia Symbian Series 60 phones

Nokia Symbian Series 60-based phones have a copy of the OS present in the built-in ROM. When you format the phone, the OS gets restored from the ROM to the phone memory overwriting the existing setup. Before you format your phone, make sure you back up all your ringtones, SMS and pictures messages and most importantly your contacts. You can use the Nokia PC Suite to do this.Also ensure that your phone is well charged before you format.Once you've done this, key in "*#7370#" It will immediately prompt you to start your phone. Select "Yes" and the phone will restart after formatting. It takes about 2 to 3 minutes to complete the process.Now restore all your ringtones, messages and contacts and you once again have a fresh OS.