I never give a thought about this,

Can you give a scenario in what condition this would be a risk?

I meant if the NFC is left active all the time, what can the pother party gain? Sniffing credit card data from your ApplePay or SamsungPay apps by using special apps in his phone?

I think this is unlikely to happen because you still need to initiate payment for data to be sent out

This post has been edited by Zot: Dec 12 2025, 02:27 PM

I think this probably just a metal in shape of credit card. This will effectively block RF signal from reaching antenna inside the credit card because a big metal piece is not tuned to receive the frequency transmitted.

That is with physical card. That is why bank put limit, an amount that bank is willing to risk if anything happened.

With card, the POS terminal transmit RF signal to the card. It generate electrical power in the card for card to transmit back detail to the terminal. As for the phone, you need to initiate the transmission. Unlike the with card, the phone transmit RF signal to be read by the POS terminal, one way transmission. This is why sometime when you pay by phone transaction failed but when you use physical card it works. This is because the older generation of POS terminal is not designed to received signal from phone. It can only initiate transmission and to read date back from card.