LG E900 Optimus 7 hard reset full reset
Press and hold both Volume UP + Volume DOWN + Camera + POWER ON LG E900

WARNING: All of your data will be lost!
1. Factory Reset.
Go to tap Applications list > Settings > about > reset your phone.
2. Try to update latest SW version via Web.Your phone are alerted to Windows Phone Updates
automatically by the Windows Phone Update service, and the updates are installed on the
phone by using the Zune software running on your personal computer, when you connect your
phone with it.