Here is a guide on How To Hard Reset O Plus 8.93
1. Power off the phone.
2. Press and hold volume up and power button.
3. When you see the O Plus logo unpress power button and volume up button.
4. You will see android icon, and below it says "deleting". Just wait, then you will see android lying.
5. Press power button shortly and you will be directed to Android System Recovery as show on the image below.
6. Select "wipe data/factory reset", press volume up to do the process.
7. Select "delete all user data", press volume up to do the process.
8. Finally reboot it.
