Android: Factory Reset
This applies to: RM, MangoMobile, etc.
Factory Data Reset for Android Handheld
From home screen, click the menu button at center-bottom of the screen.
Access "Settings" on second page of menu options.
Scroll down to "Personal" within settings menu and access "Backup & Reset"
Select "Factory data reset"
Check the “Erase phone storage” box and click "Reset phone" at the bottom of the screen.
Select “Erase everything”