This has been bothering me for a while – NFC refused to work on my Samsung Galaxy phone. Service was enabled and running, no errors or warning were displayed, but phone was unable to detect any NFC presence – tags, stickers, point of sale etc.

I was wrecking my mind until I realized that a while back I replaced the original Samsung Battery with a higher capacity generic one to extend battery life. But original Samsung Battery acts as an NFC antenna as well!

As soon as I put original battery in – lo and behold NFC sprang to action.