If your Galaxy A53 5G shows “calibration needed” after a display change, it means the new screen wasn’t properly calibrated for the fingerprint sensor. This happens even with original displays if the calibration step wasn’t done at the service center.
You can’t fix this at home - the phone needs Samsung’s fingerprint calibration tool, which is only available at an authorized Samsung service center. Visit them and ask for fingerprint calibration for the new display.
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