i’m posting this as a PSA… but also because i want to force the issue with China… but “CUID” does not mean gen2… I have had plenty of vendors and suppliers use CUID to mean anything from mifare classic legit cards with no changable UID to gen1a and gen2… but on the other hand they don’t know what “gen2” means either… so I have to ask them every time to confirm how the card / chip works, and I do this by asking for the exact proxmark3 commands used to write to it. Once they send me the commands I know what kind of chip it is.
This is the way.