off-topic apologies - how to unlock sim (not phone)

Sébastien Lorquet squalyl at gmail.com
Tue Feb 22 14:35:13 UTC 2011


Hi,

the phone does not seem to be involved in this topic. It's only about the
SIM.

And you can't flash a sim like a baseband. That would be too easy.

Sebastien

On Tue, Feb 22, 2011 at 3:28 PM, Marius Cirsta <mforce2 at gmail.com> wrote:

>  A nicer fix would be to flash it with some open source firmware :).
> That would be cool and I guess it's what this project is all about.
>
> On Tue, Feb 22, 2011 at 5:24 AM, Harald Welte <laforge at gnumonks.org>
> wrote:
> > On 02/20/2011 02:07 AM, Scott Weisman wrote:
> >>
> >> I apologize for this in advance. I figure the collective GSM knowledge
> >> here might be able to help me.
> >
> > Well, I think it is interesting from a 'scientific' point of view, i.e.
> > understanding how such mechanism is implemented.
> >
> >> I have a SIM card that can only be used on one phone. The phone itself
> is
> >> unlocked. But the SIM won't work on any other phone. Does anyone know
> >> anything about this or how to unlock a SIM to work on any phone?
> >
> > I think the first step is to trace what is happening between phone and
> sim
> > card, possibly by using osmocom simtrace.
> >
> > Once you have a trace, you can look at the messages and try to identify
> the
> > mechanism the SIM uses to identify the phone.  After that, you could
> > possibly implement a small program for a proxy SIM like bladox or
> RebelSIM
> > which patches the messages to make the SIM card happy.
> >
> > All in all not an easy undertaking, but it can definitely be solved.
> >
> > Regards,
> >  Harald
> >
> >
>
>
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