So I work for a company that repairs cell phones. We will call this company X. X has been repairing phones for awhile now, and we just now started having this issue. Whenever we replace an iPhone 7 battery, on first boot the Touch ID will not work, so therefore the home button will not work. When we put the original battery back in, the Touch ID works fine. With ours, no dice. To get it to work, we must replace the screen in the iPhone with our battery then it works, so obviously the home button works fine. I have been digging through the internet but no one seems to have this exact issue. Everyone just says the cable was damaged during the repair, and these post are from over a year ago. It has only been recently we have ran into this. 4 iPhone 7s in a row, and each has the same outcome and symptoms. Has anyone else had experience with this? Could it be the iOS 13 update and it has code we are unaware of? If anyone could shed some light, it would be appreciated.

At first we believed we just damaged some cable, but 4 in, each being more careful than the last, we have no explanation. The original battery restores functionality. So the original screen isn’t damaged.