According to Apple, some iPhone X displays can experience problems with responsiveness due to a display module component that can fail. Affected devices have a display or part of a display that does not respond to touch or responds intermittently, or a display that reacts without being touched at all.
Apple says that customers experiencing this issue can get a replacement display module from an Apple retail store or Apple Authorized Service Provider at no cost.
There is no serial number check nor specific time period that outlines when affected devices were sold, so presumably this display component failure can impact any iPhone X device. Complaints about ghost touches and displays that fail to respond to touch have been circulating on the MacRumors forums for several months now, dating back to when the iPhone X was first released.
iPhone X users with a display that has these symptoms should visit an Apple retail store location, find an Apple Authorized Service Provider, or contact Apple Support to arrange mail-in service to get a replacement.
Apple recommends customers back up their iPhones to iTunes or iCloud before pursuing repair, and the company warns that other damage, such as a cracked screen, may need to be addressed before the display repair can be completed.
This Apple program does not extend the standard warranty coverage of the iPhone X, and repairs may be restricted or limited to the original country of purchase. The program covers affected iPhone X devices for three years after the first retail sale of the unit.
Apple says that if customers affected by this issue already paid for a repair, they can contact Apple Support for a refund.