Hi Melvin, are you sure you are using T=0 when talking to the card? simtrace2 (sniffing as well as cardem) only implements the T=0 protocol so far, as in the SIM card world, there is no need for other protocols like T=1. If your card/reader are using T=1, then this would certainly explain why you don't get any output. It can trace any communication using T=0, there is no constraint on the type of APDU/TPDU used. -- - Harald Welte <laforge(a)osmocom.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)