C123: reading SIM stuck

[Frank Rosengart]

Hi,

just for curiosity, I would like to get the osmocomBB running on the
Motorola C123. Everything works fine (radio starts scanning for
networks) if I use the test SIM feature. But reading a real SIM plugged
into the phone does not work for me.
The 'mobile' app shows:
<0004> subscriber.c:556 Requesting SIM file 0x2fe2
<000e> sim.c:209 got new job: SIM_JOB_READ_BINARY (handle=00000004)
<000e> sim.c:697 go MF
<000e> sim.c:241 SELECT (file=0x3f00)
<000e> sim.c:187 sending APDU (class 0xa0, ins 0xa4)
-end-

Any hints where to start debugging?
(does neither work with 3 different SIMs: swisscom, blau, super-sim)

BTW: Are there any plans to support external SIM readers via PC/SC etc.?

Thanks
Frank