Hittade lite mer, dock får någon annan säga om det fungerar och jag rekommenderar att inte testa utan att undersöka mer.
Från: http://www.askvg.com/google-android-hidden-secret-codes/
HTML:
*#*#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.
*2767*3855#
Think before you give this code. This code is used for factory format. It'll remove all files and settings including the internal memory storage. It'll also reinstall the phone firmware.
PS: Once you give this code, there is no way to cancel the operation unless you remove the battery from the phone. So think twice before giving this code.