How does a new bank card know whether you have entered your pin once to then activate contactless payments? And how did all bank cards know when the contactless limit on card went up from £30 to £45 in the UK?

Question

A customer asked me this at work and I didn’t know the answer!

In: Technology

Answer 1

the card doesn’t know these details. the card does not even know your PIN.
all these details are held in the banks’ big computers , and everytime you swipe or dip or use your card, the computers are contacted to verify and approve these.