1.Press And Hold Volume Down + Power Key.
2.Now You See Android Logo.
3.You Will See Recovery Option.
4.Now Select Wipe Data / Factory Reset.
5.Now Reboot Device.
Ensure you have any important data backed up before doing a reset. This includes your Google Authenticator credentials, which will be lost during the reset. Disable two-factor authentication on your accounts first or you’ll experience some trouble afterwards.