A verse for you
“Iron sharpeneth iron; so a man sharpeneth the countenance of his friend.”
Proverbs 27:17
King James Version
Android — screen on, unlocked. Hold the back of the phone flat on the chip for a second. Nothing? Settings → Connections → NFC on.
iPhone — screen on. Hold the top edge (by the camera) on the chip. iPhone 7–X: open the Camera app first.
Still nothing? Out of a metal or wallet case, and slowly — it needs to touch.