On Tue, May 21, 2013 at 03:53:45PM +0200, Arthur Léna wrote:
I tried booting the iPhone using 2 different SIMs
(this one from
Free Mobile and another one) and the trace seems very short using
the Free Mobile in comparison to the other one. By parsing the ATRs
of both SIMs, I found out that the communication is done at 312500
bits/s with the Free Mobile SIM and only 78125 bits/s (for a clock
running at 5MHz). Could this explain the loss of entire ADPUs by the
tracer? If yes, is there a way to remedy to this problem (firmware
update for example).
Some people reported success by reducing the size of buffered bytes
in the firmware.
holger