Is it possible to attach an external NFC antenna to a bank card with a non-working internal one?

Question

NFC

If the paypass contactless payment function in a bank card has stopped working due to a bend in the card, is it possible to restore it by soldering an external NFC antenna to the chip? Which antenna is right for you?

Answer 1

These cards mainly use a conductive adhesive to "weld" the contact from the back of the chip to the antenna contacts. You can try to carefully pick out the chip from the plastic, clean the contacts and glue it again, but you need conductive glue for the contacts and glue to stick the chip into the plastic.
You can attach an external antenna, you need a donor similar in frequency (13.56MHz), instead of the chip of which a banking module is soldered. It will work, but I can't vouch for the appearance))) I think the sellers in the store will also be interested in how the payment is made with a "white blank card".
The best option is to claim a free replacement at the card issuer's bank.