On your Android device, tap on “Settings.”
Select “Connected devices.”
Select “Connection preferences.”
You should see “NFC” and “Android Beam” options.
Turn both of them off.
I’d go with bhg’s suggestion.
Whenever I’ve had any kind of problem with anything electronic, detaching and re-attaching the battery has usually resolved the matter in 90% of such instances.
NFC is a feature that allows you to make a payment just by hovering your phone over the payment terminal.
It allows you to leave home and carry no cash.