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Privacy: Factory Data Reset
Accounts and Messaging
Resetting the device restores all the factory defaults and erases all personal data, including from the internal storage, information about your Google Account, any other accounts, your system and application settings, and any downloaded applications. Resetting the device does not erase any system software updates you've downloaded or any files on your microSD card, such as music, pictures, or applications. After resetting the device, the next time you turn on the device, you're prompted to reenter the same kind of information as when you first started the device. 1. Press > > Settings > Privacy > Factory data reset.
2. If you are certain that you would like to restore all factory settings, tap Reset phone. 3. Tap Erase everything to confirm.