Samsung Galaxy S2 Factory Reset

  1. Turn off the phone.
  2. Press and hold down Volume Up + Home + Power buttons at the same time.
  3. Release all buttons when you see SGS2 Logo.
  4. Android system recovery will be loaded then.
  5. Select wipe data/factory reset. (Volume buttons to go up or down, select with Home button)
  6. Select Yes — delete all user data.
  7. Finally, select reboot system now.