Chosen Solution
I was trying to repair the screen in and iPhone XS and by mistake the flex wire of the Face ID sensor-speaker cut. So if I buy a new it’s not possible to reprogram the Face ID , what’s are the options for fixing them? Is it possible to solder the flex cable , can I buy the part and desolder the chip from the original to the new part?
You could but Microsoldering is quite hard! I would suggest a professional.Chaco a few Yt tutorials first so you know what to expect!
I didn’t find any specific information on the XS, but the Face ID components are very similar on the X so the following articles might be of interest. One describes swapping chips, while the other seems to be suggesting that the Face ID information can be reprogrammed in the earpiece speaker assembly. How to Fix iPhone X Face ID Not Working After Screen Replacement - iFixit Repair Guide iPhone X Face ID Not Working Fixed By Replacing Earpiece Flex Cable - iFixit Repair Guide
Orrrrrr go the Apple route and pay them to do it.
