1st method

  • Enter *2767*3855#
  • Wait until phone reboots

 

2nd method

  • Power off the phone
  • Press and hold 5 key (Blue)
  • While holding 5 key (blue) power on the phone (yellow button)
  • Format will start
Samsung GT-B6520 Omnia Pro 5 Hard Reset
Samsung GT-B6520 Omnia Pro 5 Hard Reset