a problematic sim?

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Lukas Kuzmiak lukash at backstep.net
Wed Dec 14 13:42:29 UTC 2011


Hello there,

I've been playing with simtrace a lot lately, works almost flawlessly :)
now i got to a simcard which behaves somehow weirdly:

Lukass-MacBook-Air:host lukash$ ./simtrace
simtrace - GSM SIM and smartcard tracing
(C) 2010 by Harald Welte <laforge at gnumonks.org>

Entering main loop
ATR APDU: 3b 16 95 d0 00 45 f7 01 00 a0 a4 00 00 02 a4 7f 20 9f 20 a0 c0 00
00 20 c0 00 00 00 00 7f 20 02 00 00 00 00 00 13 33 00 18 04 00 83 8a 83 8a
00 01 00 00 06 fd 00 00 00 00 90 00 a0 a4 00 00 02 a4 3f 00 9f 20 a0 a4 00
00 02 a4 7f 20 9f 20 a0 c0 00 00 16 c0 00 00 00 00 7f 20 02 00 00 00 00 00
13 33 00 18 04 00 83 8a 83 8a 90 00 a0 a4 00 00 02 a4 6f b7 94 04 a0 a4 00
00 02
APDU: a4 6f 05 9f 0f a0 c0

it's everytime just this, exactly the same - there's an ATR and some select
APDUs mixed together, something's not right.
Nothing more appears even if I'm entering the pin, then the phone
successfully initializes and authenticates to the network nothing is
displayed, I've spent quite some time restarting, reflasing, recompiling
everything because I thought my setup was somehow incorrect, but when I
left everything as it was and only changed the sim for a different one,
everything works just fine.

Any idea what might be causing this?
I can provide some debug info, just not sure what can be helpful, I have
the ftdi cable for osmocom so I can try to connect it and see what's there
if needed.

P.S.: software and firmware are the latest what's in the git right now,
I've patched the sources with that mac os x usb init patch as I only have a
mac here.

thanks,
lukash
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