iPhone FaceID stopped working after 13.5 update––is this a bug or hdw failure? So here's the story...
My iPhone X was working just fine on 13.4.x. Then a couple weeks ago I updated to 13.5.1 because of the rumored FaceID w/Mask unlock. Everything seemed to be working fine––but I think I got so used to typing passcodes I didn't notice if FaceID ever worked after the update.
When I finally realized something was wrong with FaceID, I did the usual: soft reset, FaceID reset, and then finally, factory reset. Nothing worked, and once I reset FaceID, I could never &quot;Set up Face ID&quot; again. Every attempt left me with the &quot;move the phone higher/lower&quot; bug.
Since then, I've also updated to 13.6 with no change in FaceID. After reading more than a few pages on the web, I've got the following diagnosis:
iPhone X FaceID checklist:

Proximity sensor/AutoBrightness OK
Animoji OK
Selfie camera portrait-mode does NOT work, “move farther away” msg, no background blur
Rear camera portrait mode OK

&quot;Set up Face ID&quot;

shows &quot;position your face within the frame&quot; or &quot;move iPhone a little higher/lower&quot;

Can someone help me determine if this is 1) a software bug or 2) a fatal hardware failure that coincidentally emerged within days of upgrading to 13.5.1?
May vote is neither.
It’s not a software bug in that release - we would have floods and floods of people with issues if there were a bug breaking FaceID.
It’s not likely a coincidental hardware failure. Of course if you suspect that seek hardware service immediately.
It’s much more likely some general corruption on the combination of your software, your apps, your data and the device. The steps to troubleshoot that would be to get a good backup, erase all settings and content, set up FaceID alone before you restore any data. If that doesn’t work, then restore the device entirely from a computer. Repeat the “set up nothing except FaceID” test.
Based on that you may have hardware - seek service knowing you have a backup.
Or you may find the hardware and software work, then decide to erase and try restoring your backup or just setting up new.