Oh! DesFire is different from Mifare. similar tech, but different. I gotcha, makes sense.
I have my Suica card on hand, and I scanned it with the TagInfo app. would I be looking at IC type? if so, this is a FeliCa IC.
It doesn’t say mastercard on it at all, so I’m a little hopeful.
okay. so the tag type is a JIS 6319-4. I haven’t seen that one yet, soooo… hopes are now rather low lol