✅ Reset all Nokia Lumia devices 

Reset an unresponsive phone
Press and hold the Volume down and Power buttons at the same time until you feel a vibration (about 10 to 15 seconds).
When you feel the vibration, release the buttons, and then immediately press and hold the Volume down button until you see a large exclamation mark.
Once the exclamation mark appears, press the following four buttons in this order: Volume up, Volume down, Power, Volume down. Your phone should now reset and restart itself. (It might take a while for the reset to finish.)
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