Did you lose iPhone Touch ID after screen repair? - TDR - National Repair Center
Many people have went to their local iPhone repair shop to get their iPhone screens fixed, specifically for the iPhone 7 or 8, and have found themselves at a loss of touch ID... No worries we can fix it.
Here is what happened. The button on the iPhone 8 and iPhone 7 has a very flimsy ribbon cable.. and the flex cable can easily get damaged. Apple has made an encryption code between the phone and the buttonso you can not use the touch ID if a replacement is added, even from a genuine iPhone!
What we have done is introduced a new button fix that can work on all issues with your iphone touch ID. We have tested and know it works perfectly. so you can have the functionality return to your iPhone. We use quailty parts that have been manufactured specificaly for this issues and yes we can definitely bring that feature back that was broken.