-> That's not wifi, that's NFC. You could use a NFC connection to boot a wifi connection on smartphones, but this is way too time consuming.
-> Second, NFC card readers are not simple, that's not just RFID.
-> Contact-less payments without PIN input is authorized for a few merchants and require additional security measures (like sending a SMS for each purchase, etc)
Most larger stores have fixed pin pads pointing to the customer. It is not possible for the cashier to insert it for you, in fact, this is the PCI standard for pin-pads.
Comments
-> That's not wifi, that's NFC. You could use a NFC connection to boot a wifi connection on smartphones, but this is way too time consuming.
-> Second, NFC card readers are not simple, that's not just RFID.
-> Contact-less payments without PIN input is authorized for a few merchants and require additional security measures (like sending a SMS for each purchase, etc)
Most larger stores have fixed pin pads pointing to the customer. It is not possible for the cashier to insert it for you, in fact, this is the PCI standard for pin-pads.