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Hi All,
I have a question. I've been issued with 2 credit-cards with the tap-to-pay system. Proxmark identifies these as a MIFARE 4K DESFIRE card.
What puzzles me is, if i download a run-of-the-mill Android NFC app and scan the card with a Galaxy S7 - the app displays the Credit-card number, expiry date and name.
The Proxmark however refuses to get any data off the card. It just says the keys are invalid, or other errors. What am i doing wrong? It does successfully identify the card though.
Thanks,
neoprema