Face ID Not Working [Fixed. Please see the approved answer for details.]

Hi folks,

Thanks for following up. This is a high-priority issue we're actively working on resolving. In the meantime, we do have a solution that's worked for other people running into this, but as it requires factory resetting your device and restoring from an iCloud backup, it's definitely something that should be done at your own risk. We're hoping to know more soon on this, so waiting for the fix would be recommended, but if you'd like this sorted out right away here are the steps to follow.

It's important to note that there is the potential for data loss here. As with anything that involves resetting and restoring your device, ensure that you have a full backup of your device before proceeding. I realize this isn't an ideal solution, but it's currently the best option for resolving this issue.

1. In the Settings app, tap your name at the top > iCloud > iCloud Backup. Then turn on "Back Up This iPhone / iPad" if necessary and tap "Back Up Now". Allow the backup to proceed.
2. Use the < back arrow at the top-left corner repeatedly to return to the main Settings list.
3. Tap General > Transfer or Reset iPhone / iPad > Erase All Contents And Settings.
4. Follow the onscreen instructions to make a final backup, sign out of your Apple ID, and erase the device.
5. When the device restarts, choose your language, country/region, and Wi-Fi network, then choose "Restore From iCloud Backup".
6. Sign in with your Apple ID and choose your most recent iCloud backup.

After performing these steps, the other important thing to do is to avoid using any options from the Transfer or Reset iPhone menu in Settings > General. We've found that using Reset All Settings may be linked to this issue.

Jack