Compatible with Samsung Galaxy J4 (2018) models SMJ400F/DS and J400G/DS (Black). This is a replacement fingerprint sensor flex cable, supplied in Color : Blue. Key benefits Restores fingerprint recognition and homebutton functionality after damage or wear. Replacing a faulty flex cable is a costeffective way to a Galaxy J4 to full biometric operation without replacing the entire device. Designed to match the original part's shape and connector layout so it fits the phone's fingerprint assembly and mainboard reliably. Durable flexible construction reduces the risk of breakage during installation and normal use, providing a stable electrical connection for consistent sensor performance. What it does Transfers data and power between the Galaxy J4 fingerprint sensor and the phone's mainboard. Replaces torn, creased, or corroded flex cable assemblies that cause intermittent or complete failure of fingerprint recognition. Key attributes Compatibility: Samsung Galaxy J4 (2018) SMJ400F/DS and J400G/DS (Black). Part type: Fingerprint sensor flex cable (replacement). Color: Blue (as listed). Construction: Flexible ribbon design compatible with original flex cable routing and connector positions. Performance: Restores secure, fast fingerprint response when properly installed. Use cases / applications at home: a damaged fingerprint flex cable to bring back biometric unlocking and homebutton function on a Galaxy J4. Professional phone : Keep this part in stock for common frontend repairs and fingerprint sensor replacements on SMJ400F/DS and J400G/DS models. Refurbishment and resale: Install a flex cable during device refurbishment to ensure the fingerprint sensor works for resale or tradein. Notes for buyers Sold as a replacement flex cable only; does not include the full fingerprint sensor assembly, housing, or tools. Installation requires delicate disassembly and careful connector handling; professional installation or experience with smartphone repairs is recommended to avoid further damage. Verify model number (SMJ400F/DS or J400G/DS) before ordering to ensure compatibility. Includes 1 x Fingerprint sensor flex cable replacement for Galaxy J4 (2018) SMJ400F/DS J400G/DS (Black) (Color : Blue)