You could perform a factory reset on your Samsung Focus using the Windows Phone 7 software, but what do you do if the phone is frozen and won’t respond when you go to do a hard reset? Luckily, you can perform a hard reset using the hardware keys.
Note: These steps will wipe all data from the phone and set it back to factory default settings. Be sure to backup your data on the phone before performing these steps.
1. Press and hold the Camera, Volume Down, and Power buttons simultaneously.
2. Release Power when the phone vibrates, but continue to hold down Camera and Volume Down.
3. Release Camera and Volume Down when the Format prompt is displayed on screen.
4. Press .
5. Press again to confirm the hard reset.