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

Disassembly and Assembly

2 Ensure that there are no abnormalities.

• Check whether the parts or sensors in the device work properly with the Self Repair Assistant app after repairing and assembling your device. Refer to Calibrations for more information. • Visit a Samsung Service Center when finding some issues from the calibration results. However, you may incur additional charges if the device has a malfunction because of DIY repairs.

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