Chosen Solution

My phone is having a problem with face ID it said move little lower and it is very frustrating but my proximity sensor, ambient ligth, front speakers and microphone is still working. I don’t think the flood illuminator , infrared camera and dot projector is not working.But when I use protrait mode in front camera it doesn’t change the stage ligth, stage ligth mono others also and when i use animoji it still works. How do i know my known my flood illuminator, infrared camera and dot projector is not working? If I change the flood iluminator will it work? And after trying to add face ID It said face ID is not available try setting up face ID later and I do not see the infrared light coming out from the flood illuminator.

Looks like you can check out the guide here as a reference. Troubleshooting iPhone X Face ID Not Working ‘Move iPhone a Little Lower/Higher’ Good luck bro!

If you’ve attempted replacement of the FaceID component, its possible that the secure enclave protection has kicked in. Replace it with the OEM part and continue troubleshooting from there.