Iphone 6s Touch Id Not Working After Battery Replacement. This does sound like a possible hardware issue since it coincided with the battery replacement. It brings some bug and glitch fixes and improvements in the performance of the phone.

Hello I have a strange situation after battery replacement my Touch ID is not working. Touch ID cant be recognized. Recently there are many customers complained that their iPhone 67 series touch ID function was not working after changing the screen replacement here weve share some possible reasons that why your touch ID is not working.
Without powering off the phone before replacing the screen.
Screen itself works fine its only the touch that doesnt work. I checked the connectors for any damage but it all looks fine. Yes my point is that I had an Apple technician replace the battery and discovered on the way home that the touch ID would not work. HOWEVER I factory reset my iPhone and the battery health feature restored.

