Long press Button Volume and Power at the same time until it shows you a setting that listed Reset phone or Restore factory.
Step 2
Then Scroll down to reset or restoring factory by pressing Volume button as a downward scroller and power as an okay presser.
once you press reset, wait for at least 5 minutes to complete resetting your phone data.
after finishing resetting complete set up your phone start using it.

0 $type={blogger}: