The easiest option would be hard/factory reseting the device it found someone who said hold the button for 20 seconds you will need to add back the contacts.
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=== Update (08/13/23) ===
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Hello I did some more reasearch and lt liiks like you need to dial a special code ''#174714#.'' Hope this works!
The easiest option would be hard/factory reseting the device it found someone who said hold the button for 20 seconds you will need to add back the contacts.