The iPhone X shows an alert that says it is ‘unable to activate Face ID on this iPhone’.

When trying to setup Face ID on the iPhone X, we get the message 'Face ID is Not Available, try setting up Face ID later'.

Also, according to the feedback from our client, Face ID on the phone is available after being dropped. However, Face ID is not available after replacing of the display assembly.

Unavailable Face ID might be caused by improper operation when replacing the display assembly.