How to retrieve AFL from mastercard?

Question

I'm trying to read some data like track 2 from mastercard contactless. But the PDOL not returned after select AID command, so how can I construct GPO to read AFL? to initiate read records comnand. If there is any advice?

Answer 1

I trird to send GPO command without PDOL like this: "80A80000028300" and then I can read AFL in response.