iPhone 6 touch id not working after screen replacement
I recently had a cracked screen on my iphone 6 replaced and now the touch id does not work. When I go to set up touch id, it does not read my fingerprint when it says to input your fingerprint. also the double tap on the home button to bring the screen halfway down does not work. I tried restarting the phone, and we even did a complete wipe to default with no luck. Updating to iOS 9 did not change it either. The guy who fixed my phone thinks its the touch id sensor, but he has had trouble getting a new one to put in the phone. Has anyone had this issue as well? Is what he wants to do the right solution? Any suggestions?
Thanks
iPhone 6, iOS 9