"Touch id on iPhone 6s won't work after transferring home button over?"に関する回答Check out this thread for some hints: Touch ID not working after screen replacement
"help would be appreciated with a Touch ID problem"に関する回答I had this issue. Make sure you wipe the phone completely before doing a restore from backup, and upgrade the OS. That worked for me. After just doing a reinstall, couldn't get the Touch ID to register. Something about a full hardware reset connects to the home button.