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Astronaut

My A21 will not unlock, it keeps saying fingerprint hardware not available. My pin doesn't work also

 
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Constellation

Re: My A21 will not unlock, it keeps saying fingerprint hardware not available..

First option would be restart the phone.
second will be factory reset or hard reset by using the hard keys on the phone as if u are not able to use the any of the option to unlock it.
Make sure the battery of SAMSUNG GALAXY M21 charge properly or battery have more then 50% capacityTurn off SAMSUNG GALAXY M21Press and hold together : Power Button + Volume Up until Logo appear, then release all buttonPlease wait until we see the menu at LCD screen, choose Wipe Data/Factory Reset with Volume Button to select and use Power Button to ok or enter.The SAMSUNG GALAXY M21 will do the process of restoring to factory default without any password or passcode (hard reset).
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