Replacement fingerprint sensor flex cable compatible with Samsung Galaxy J4 (2018) models SMJ400F/DS and J400G/DS. The assembly includes a black fingerprint sensor attached to a goldcolored flex cable, designed to restore fingerprint recognition and secure unlock functions on devices with a damaged or nonresponsive sensor. Key benefits Restores fingerprint unlocking and biometric authentication so you can use secure, fast access again. Costeffective alternative to fullscreen or device replacement. Designed for direct replacement of the original flex assembly to match the phone's layout and connector type. Helps resolve issues caused by a torn, bent, or disconnected flex cable or a nonresponsive sensor. Key attributes Compatibility: Samsung Galaxy J4 (2018) SMJ400F/DS and J400G/DS only. Sensor color: Black; Flex cable color: Gold. Functionality: Fingerprint sensor assembly with attached flex cable and connector. Form factor: Replacement flex cable and sensor designed to match the original component location and connector type. Performance: Restores fingerprint recognition and touch responsiveness when installed correctly. Use cases a Galaxy J4 that no longer recognizes fingerprints after a drop, impact, or water exposure by replacing the damaged sensor/flex assembly. Restore fingerprint login and secure app authentication after a failed where the original flex cable was torn or the connector damaged. Use in professional shops or DIY repairs to a used or refurbished Galaxy J4 to full biometric functionality. Installation and notes Intended as a replacement part; professional installation or careful DIY experience is recommended to avoid further damage. Ensure compatibility with your exact model number (SMJ400F/DS or J400G/DS) before . Handle the flex cable and connector with care during installation to maintain sensor performance. What's included One fingerprint sensor with attached goldcolored flex cable (black sensor). This part provides a straightforward replacement option to recover fingerprint functionality on compatible Galaxy J4 (2018) devices when the original sensor or flex cable is damaged.