The RELIFE RL-071B 4-in-1 Optical Fingerprint Calibrator V5.0 is a specialized precision calibration tool engineered specifically for mobile repair technicians handling smartphone OLED/AMOLED screen replacements and optical fingerprint scanner repairs. When a phone screen is replaced, subtle variations in glass thickness, optical clarity, and light transmission frequently trigger "Fingerprint Enrollment Failed" errors or non-responsive under-display sensor issues. The RL-071B provides the essential standardized optical targets required to recalibrate the sensor back to factory accuracy.

Designed with a versatile 4-in-1 modular target system (including standardized flesh-tone, black absorption, high-reflection, and checkerboard grid surfaces), it fully complies with the factory calibration algorithms of major Android brands—including Huawei, Xiaomi, OPPO, VIVO, Realme, and Samsung. With a non-disassembly external alignment workflow and high light-absorption precision, it restores instant biometric recognition and smooth fingerprint enrollment in minutes.

Key Features

1. Fixes Post-Screen Replacement Biometric Errors: Resolves under-display optical fingerprint recognition failures, enrollment timeouts, and poor sensor input after screen changes.
2. 4-in-1 Multi-Target Calibration: Includes 4 standardized optical target surfaces (patterned, skin-tone, light absorption, and reflection) to satisfy diverse manufacturer calibration modes.
3. No-Disassembly Rapid Alignment: Calibrates directly on top of the assembled display via factory engineering menus or service software without opening the phone casing.
4. Wide Android Brand Compatibility: Engineered for optical sensor recalibration across Xiaomi/Redmi, Huawei/Honor, OPPO/Realme, VIVO/iQOO, and Samsung devices.
5. OEM-Standard Optical Accuracy: Manufactured with strict optical reflection and light-absorption tolerances to ensure the sensor software learns the exact baseline.
6. Compact & Durable Construction: Pocket-sized industrial-grade build resists workshop oils, cleaning solvents, and wear over repeated daily use.

Specifications

1. Brand: RELIFE
2. Model: RL-071B (Version 5.0)
3. Product Type: 4-in-1 Optical Under-Screen Fingerprint Calibrator
4. Calibration Targets: 4-in-1 Surface Block Set (Black, Flesh-tone, Checkerboard Grid, Reflective Standard)
5. Supported Brands: Xiaomi, Redmi, Huawei, Honor, OPPO, Realme, VIVO, iQOO, Samsung, and other Android devices with optical in-display sensors
6. Dimensions: Approx. 45 × 35 mm (Compact & Pocketable)
7. Material: Industrial-Grade Precision Optical Composite + Anti-Slip Base
8. Application: Under-Screen Optical Biometric Sensor Calibration, Display Refurbishment, Post-Screen Replacement Servicing

Package Includes

1. 1 × RELIFE RL-071B Optical Fingerprint Calibrator Base & 4-in-1 Target Assembly

Important Notice & Terms

Important Advisory: Please ensure full technical compatibility and model verification before confirming your order. Products listed are sold under a strict No Return, No Exchange, and No Refund policy. Limited technical support is offered where feasible and cannot be guaranteed for every application. Fixtools is not liable for incorrect ordering or damage caused by improper usage; purchasing decisions rest entirely with the customer.