You have a problem with your device or you want to reset your device, you may use factory reset.
Factory reset will erase all personalized settings and data from your device's internal storage. And factory reset cannot undo.
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Navigate to Settings > System > Reset options.
Tap Erase all data (factory reset).
After being aware that the factory reset will erase all data from the internal storage, tap Erase all data.
Select Clear Enterprise storage to reset the enterprise storage, too.
Tap Erase all data again to start the factory reset process.
Press and hold the following button combination simultaneously when turning on the device.
After short vibration, release the buttons.
Using the keys below, select Wipe data/factory reset.
Select Factory data reset.
After wiping the data, select Reboot system now.