Replacement Fingerprint Sensor Flex Cable for Samsung Galaxy J4 (2018) Keep your Samsung Galaxy J4 (2018) SMJ400F/DS or J400G/DS working properly with this direct replacement fingerprint sensor flex cable. Designed to restore biometric unlocking and fingerprint recognition when the original flex cable is damaged, loose, or nonfunctional. Key benefits Restores fingerprint sensor functionality so you can use biometric unlock and apps that require fingerprint authentication. Replaces a broken, torn, or waterdamaged flex cable without replacing the entire phone. Purple flex cable allows easy identification during and reassembly. Compatibility and fit Compatible with Samsung Galaxy J4 (2018) models SMJ400F/DS and J400G/DS (for Black model). Form, connector layout, and mounting points match the original part for proper fit when installed correctly. Functionality and performance Flex ribbon cable that transmits the fingerprint sensor signal to the mainboard, enabling reliable fingerprint recognition when properly installed. Flexible construction designed to bend with normal phone assembly while maintaining electrical continuity. Intended as a replacement part to restore original device functionality. Material and size Thin, flexible printed circuit ribbon similar to the original component used in the device. Compact design fits into the device's internal housing. (Designed to match original dimensions for the listed models.) What's included One fingerprint sensor flex cable replacement (color: Purple). Use cases a Galaxy J4 that no longer recognizes fingerprints after a drop, impact, or internal flex cable damage. a flex cable affected by water exposure or corrosion to restore biometric unlock and app access. Refurbishment or refurbishment projects where original fingerprint functionality is required for resale or continued use. Notes and installation Intended for the specified Samsung Galaxy J4 (2018) models only. Verify your model number before ordering. Professional installation or experience with mobile phone repairs is recommended to avoid further damage. Use appropriate tools and antistatic precautions. This replacement flex cable provides a straightforward way to restore fingerprint sensor functionality on compatible Galaxy J4 (2018) devices.