Face ID in iPhone not working

Start here: If Face ID isn't working on your iPhone or iPad Pro - Apple Support

If that fails to resolve this, contact Apple Support and discuss your options and alternatives with them. It’ll probably need a hardware repair.

Official Apple Support

Similai Said:

"Face ID in iPhone not working: I need how can use passcode only to unlock my phone because faceid not work i need to turn off faceid"

-------

Troubleshooting a Locked iPhone:

Seems you have a locked iPhone. So, contact Apple Support. Refer to the following...

Hold It Right There!:

Enter the passcode incorrectly too many times, and you'd likely be locked out for good. So, hold it right there, and refer to this link: If you Forgot the Passcode on your iPad, or your iPad is Disabled - Apple Support. It would be the one you've always entered. If you do not know it, then look for it in a location you may have stored it in.

Being Locked Out...

Have any Proof of Purchase?

Unless you have the original packaging and receipt, you may be out of luck. If you do have it, however, then take this to an Apple Store, or an AASP (Apple Authorized Service Provider)! and they may be able to restore it. The reason for this blockage is all about Security & Privacy.

Apple Contact Info:

• Contact Us - Choose Locations
• Proceed from there, as necessary

Face ID not working on iPhone after iOS 1… - Apple Community