Answer to "iPhone 7 NFC(Apple Pay) not working after battery replacement"I replaced my screen on an iPhone 7 and afterwards apple pay would not work (I got no response from the phone when I held it up to a contactless payment terminal). I tried another screen with no luck and thought I had damaged something. But when I tried yet another screen I noticed something in the repair process. At the top right of the phone ( when you are looking at it from the front but with the screen removed) there is a connector for the front facing camera. This connector has a small metal plate over it to keep the connector in place. This plate is secured by two small screws. The screw that is closest to the edge of the phone actually screws into another screw. That lower screw has a hollow centre that is tapped to accept the screw that holds the metal plate in place. But I noticed it had come a bit lose. It needs to be tightened with a small flat blade screwdriver. I did that then replaced the screen connectors and metal plate and, hey presto, NFC is back in operation.