Chosen Solution
Just noticed that my nfc isnt working when trying to use apple pay. I replaced the battery myself last week so Im assuming I damaged something during the process. What should I start with checking or replacing? Thanks
You may have inadvertently damaged or not re-assembled the NFC bracket next to the Screen Bracket. Check out this guide, specifically steps 30-31.
I had replaced my iPhone 6S Plus battery (2750 mAH) with that of 6 Plus (2915 mAH) since both have the same connectors. Battery life did slightly increase but at the expense of the non-functioning NFC/Apple Pay. I think it might have to do with the overclocking of the NFC frequencies out of the acceptable spectrum . I thought the slightly longer battery life wasn’t worth the lack of NFC so I installed the correct one for iPhone 6S Plus battery (2750 mAH) and NFC/Apple Pay is working well afterwards.
