Pantaohuaes Fingerprint Sensor Flex Cable for Galaxy J4 (2018) SMJ400F/DS J400G/DS (Color : Purple) a broken or unresponsive fingerprint sensor connection with this directfit flex cable designed specifically for Samsung Galaxy J4 (2018) models SMJ400F/DS and J400G/DS. The part restores the physical connection between the fingerprint sensor and the phone's mainboard so biometric unlocking and related functions can work again. Key benefits Restores fingerprint functionality quickly: replaces a damaged or disconnected flex cable to bring back biometric unlock and fingerprintbased apps. Modelspecific fit: made for Galaxy J4 (2018) SMJ400F/DS and J400G/DS to help ensure correct alignment and connector compatibility. Visible color for easier installation: purple cable makes it easier to identify during and reassembly. Saves cost vs. full assembly replacement: replacement of the flex cable can be a costeffective when the sensor or button is in good condition. Main attributes Compatibility: Samsung Galaxy J4 (2018) models SMJ400F/DS and J400G/DS. Function: fingerprint sensor flex cable — replaces the original ribbon that transmits touch data between the fingerprint sensor and the motherboard. Form: flexible ribbon/flat cable designed for compact smartphone internals and accurate connector alignment. Color: purple (as specified). Intended use: replacement part for technicians or experienced DIYers restoring fingerprint sensor function. Practical use cases a phone that no longer recognizes fingerprints after a drop or screen replacement by swapping the damaged flex cable. Use during refurbishing or resale of a Galaxy J4 (2018) to ensure the device has fully functional biometric unlocking before listing or returning to service. a frayed or torn ribbon cable discovered during diagnostics to eliminate intermittent sensor behavior and improve reliability. Installation notes and recommendations Intended for technicians or experienced DIYers familiar with smartphone disassembly and reassembly. Handle with care: flex cables and connectors are delicate. Avoid excessive bending, pulling, or contact with staticsensitive components. If you are not confident performing the , seek professional installation to avoid further damage. What's included One Pantaohuaes fingerprint sensor flex cable (purple) compatible with Galaxy J4 (2018) SMJ400F/DS and J400G/DS. This part is designed to the original fingerprint sensor flex cable for the specified Galaxy J4 (2018) models. Verify model number before to ensure compatibility.