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1st method
- Go to menu or to notification
- Click settings
- Select Backup and reset -> Select Factory Reset -> Confirm
- Select Reset Tablet-> Erase everything -> Confirm
2nd method
- Power off the Tablet
- Press and hold Volume up (Red) + Power on (Yellow)
- When options appear with Volume down (Blue) go to wipe data / factory reset and select it with Power on (Yellow)
- Use Volume down (Blue) again and go to Yes and select it with Power on (Yellow)
- Select Reboot system now with Power on (Yellow)