RELIFE RL-071B 4 in 1 Android Fingerprint Calibrator for HUAWEI XIAOMI OPPO Android Phone (Available on Order) Relife RL-071B Android Fingerprint Calibrator Actual delivery: 1 Platform + 1 calibration blocks rl-071b fingerprint optical corrector Android brand entry code: for vivo:*#64663#* for oppo:*#899#, 6776 forXiaomi:*#*#6484#*#* for Huawei:Use with software for Samsung: still verifying Features: RL-071B Optical fingerprint calibrator for solving the problem of screen fingerprint failure after the mobile phone is replaced Suitable for Huawei/Xiaomi/OPPO/VIVO to solve the problem of fingerprints under the screen or poor input Easy to operate/Quick calibration/Small and portable Quick To Get Started and Easy To Operate, use with software/tutorials, easy to use, no cumbersome steps High recognition rate, real machine test, solve the problem of screen fingerprint failure after the mobile phone is replaced 4 in 1 fingerprint calibrator, no disassembly calibration, convenient and fast