Payment with NFC turned off, should it work?

Question

Android

For me, this is a shaitan technology, I just started using it, in fact, it confuses me for one moment, well ... since I'm here, then even two.

1) Samsung A51 (although this is hardly important), NFC is disabled in the top menu. We make payment by Samsung Pay, the payment goes through. Um, why? As though logically - should not, time the option is switched off.

2) Does the included NFC eat the battery in the background, or is it in hibernation mostly?

PS. it was not possible to google the necessary information in a convenient form

Answer 1

1. how this happens, you need to ask the manufacturer. it all depends on the specific implementation of the NFC protocol capabilities.
2. The NFC module in the phone can be in the off state and at the same time "catch" requests from the nfc cash register, then turn on and exchange information.
while the energy in the off state, he does not eat.

Answer 2

Well, maybe when you open a card in Samsung / android Pay NFC itself is cut off?