JavaCard OS

For a contact interface, I can at least distinguish T=0/T=1 from ATR value, but how can I get the useful info from contactless interface?
In my opinion, ATS does not provide any useful information.

Check ISO-14443-4 specification first.

As fa as I know, ISO 14443-4 does not specify what is included in the information field. And also we can not see what protocol is used on top of T=CL from the ATS.