Repair guide Galaxy S21 (SM-G991B) - English - Rev.1.0

Calibrations

6 Read the on-screen instructions and tap Start . Refer to Optical Fingerprint Sensor Calibration, Resetting the Battery Cycle Count, Range Sensor Calibration, Touch Screen Panel Calibration, Speaker Calibration, Under-display Camera Calibration (Fold Models Only), and Digital Hall Sensor Calibration (Fold and Flip Models Only) for more information.

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