Google andriod secret code 2

                        *#*#7780#*#*

 

This code can be used for a factory data reset. It'll remove following things:

• Google account settings stored in your phone
• System and application data and settings
• Downloaded applications

It'll NOT remove:

• Current system software and bundled applications
• SD card files e.g. photos, music files, etc.

PS: Once you give this code, you get a prompt screen asking you to click on "Reset phone" button. So you get a chance to cancel your operation.