Samsung Galaxy A12 A125 Black Fingerprint Sensor and Button

Fingerprint Reader and Power Key for Samsung Galaxy A12

Replacement part with biometric sensor and power button to restore fingerprint reading and screen lock on the Samsung Galaxy A12. This black flex cable with fingerprint reader restores the tactile response and biometric recognition of the mobile phone.

Technical Specifications

• Part type: Flex cable with power button and biometric reader
• Compatibility: Samsung Galaxy A12 (SM-A125F, SM-A125M, SM-A125N, SM-A125U)
• Colour: Black
• Quality: Compatible

When to Replace

• The biometric reader does not recognise saved fingerprints.
• The fingerprint unlock option appears unavailable in settings.
• The phone does not turn the screen on or off when pressing the power button.
• The side button is jammed, damaged or lacks tactile click.

Notes for the Technician

• Test before applying: connect the part to the equipment and confirm its operation before fixing or gluing it permanently. Thus, if there is any issue, the return or warranty is handled quickly and simply.
• Repair difficulty: Medium.
• Opening performed via the back cover, requiring the removal of the intermediate plastic frame to access the reader connector.
• Always disconnect the battery before handling or installing the flex to prevent short circuits on the motherboard.
• Carefully place the flex in the side alignment of the chassis to avoid creasing the conductive tracks when closing the equipment.

What Distinguishes This Version

Compatible replacement part selected to ensure mechanical reliability and precise biometric reading. It is the right alternative for technicians who need an efficient solution to repair the power button and biometrics.

Frequently Asked Questions

Is it necessary to reprogram the biometric reader after replacement?
Software calibration is not necessary; it is only recommended to re-register the fingerprints in the equipment settings after assembly.

Does this component fit the Samsung Galaxy A12 Nacho version (SM-A127F)?
This version was designed specifically for the base model Galaxy A12 (SM-A125), so you must confirm the model code beforehand before proceeding with the repair.