Chosen Solution

Hello, I had Face ID failure on my IPhone X phone. So I decided to fix it. I did all the steps in full and pass the module to a new flex. When doing the test with my I2C tester it passes all the tests (leds turn on…) but the NTC fails. I don’t know if it’s the fault of the new flex I bought or what. Attached photo of the tester and the module. Thank you very much.

Sorry FaceID and NFC security elements are part of the circuit so while you replaced the part and your tester is telling you the part is working physically, its not going to allow the replacement circuit to work as the security keys are not correct (as they are new). Only Apple has the tool to reprogram the phone for the new key.