Hi again guys, I've been testing the latest firmware (git master) to see how patches from Min Xu made it better and tracing of fast sims (lost bytes, broken tracing, etc.) seems to be a lot improved. I have found one bug - somehow simtrace_hdr makes it into the APDU payloads, I've been trying to find the root cause of this but have not managed yet - seems like the FW sends 2 messages but they arrive as a single message into the host software thus the header is considered APDU payload. I've reported the issue here: https://osmocom.org/issues/2614 along with all the tracing/investigation I've performed so far - anybody got further ideas how this might happen? Other than this and the painful building of the firmware in today's world it seems tracing modern phones is not such a pain as it used to be, yay! Lukas