Fingerprint Sensor for Samsung Galaxy M21s Black

The Fingerprint Sensor in your Samsung Galaxy M21S is the biometric module that scans and recognises your fingerprint to unlock the device and authenticate secure actions. Depending on the Samsung Galaxy M21S design, it may be located on the rear of the phone, integrated into the power button on the side, or embedded under the display. The replacement sensor matches the type and location specific to your Samsung Galaxy M21S.

On most mid-range Samsung Galaxy M21S devices the replacement sensor will work after installation and fresh fingerprint enrolment through settings. However on some higher-end devices — particularly certain Apple and Samsung models — the fingerprint sensor is cryptographically paired to the motherboard. On these devices a replacement sensor may require authorised software pairing to function. Check your specific Samsung Galaxy M21S requirements before ordering.

Yes — always. After replacing the Fingerprint Sensor on your Samsung Galaxy M21S, go to Settings — Security — Fingerprint and delete all existing fingerprint data, then re-enrol each finger fresh. Old fingerprint data stored during use of the previous sensor will not be recognised by the new hardware.

It is a moderate repair requiring the phone to be opened and the sensor module carefully disconnected, removed, and replaced. The difficulty varies by sensor location — rear-mounted sensors are generally easier to access than side-mounted or under-display sensors on Samsung Galaxy M21S. Professional installation is recommended.

Yes — a 7-day replacement warranty covering manufacturing defects is included. An unboxing video is mandatory for all warranty claims. Sensors showing physical damage from improper installation are not covered under warranty. For more information, check out SAHII's Return Policy.