To perform a soft reset on the Samsung Focus, Hold down the power button. This will save all apps and data.

To perform a hard reset and return the Samsung Focus to it's retail state:

Option 1:
1. Dial ##634# from the phone keypad
2. Press the call button when the diagnostic screen appears and enter *2767*3855# to preform a full restore.

Option 2:
Hold down the Power button + Volume down button +Camera button at the same time.

Option 3:
1. Go to the Start screen
2. Choose Settings.
3. Choose the About screen
4. Select 'reset your phone'