GSM firmware hacking

[Ian Stirling]

Sébastien Lorquet wrote:
> Not sure about the legality of GSM hacking.
> 
> According to the TSM30 (-> THC project's wiki) , receiving your *own* 
> signals is ok, and you need a licence to emit anything. But playing with 
> other people's signal is not. This makes a rather
> 

Well...
There is GSM hacking, and there is GSM hacking.

There is of course the possibility to disrupt the network, obtain free 
calls, read other peoples signals, ...

But, there are other valid uses.

Enabling SIM sharing over bluetooth, or other means - to enable easy use 
of two or more SIMs (not at the same time).

Implementing the protocol to let (with a compliant provider) you roam to 
  GSM-over-wifi where it is available.

Adding more conditions to what wakes the main SOC.

Even running code on the GSM module.