strange status

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Thomas Chen tchen at on-go.com
Sat Nov 25 02:53:39 UTC 2017


i am seeing some strnge stuff with SIMTRACE ..
when i have a modem communicating with SIM, and simtrace in sniffer mode
i see a command
0x00 0xa4 0x04 0x04 0x10 + data (0xa0 0x00 0x00 0x00 0x87 0x10 0x02 0xff 
0xff 0xff 0xff 0x89 0x06 0x19 0x00 0x00)
and got response + status  (0x61, 0x44)

but in remote SIM environment.
this SIM card return
0x69 0x99

do you know what that mean ???  i dont know whether it is timing or 
something else ?

all previous commands seem to work just fine

thanks




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