The TrueDepth front camera unit (front lens + Face ID sensors) is a replacement part designed to restore the functions of the front camera and TrueDepth detection when the original unit is faulty (frozen image, undetectable camera, Face ID/TrueDepth errors depending on the defect). It is offered as a ready-to-install module with a cable, allowing for stable selfies and video calls without the need to replace the entire screen.