Factory reset will erase all data from your device's internal storage.
You have a problem with your device or you want to reset your device, you may use factory reset.
PM30, PM67, PM75
Navigate to Settings > System > Advanced > Reset options.
Tap Erase all data (factory reset).
Please be aware that factory reset will erase all user data. Tap Erase all data to start the factory reset
Tap Erase all data again to confirm the factory reset
Press and hold following button combination simultaneously when turning on the device
After short vibration, release the buttons. Now your device is entered Android Recovery mode
Using the keys below, select 'Wipe data/factory reset'
Power button
or Enter key
After wiping the data, select 'Reboot system now'