On Nov 26, 2007 10:49 AM, Cailan Halliday <[EMAIL PROTECTED]> wrote: > I just had an idea that I got from a couple of devices, how about a virtual > SIM card? Is it possible to make an ISO of a SIM card and store it in the > Neo to be, for lack of a better word, booted from? I've seen devices like > these: > > http://www.thetravelinsider.com/phones/simsaver.htm > http://www.thinkgeek.com/gadgets/cellphone/9ca8/
There are also cheap USB SIM readers, and I got the impression that they could write to the card as well. So I got one on ebay. The software that came with it (only for Windows) could only read the card. I wish there was a Linux alternative, especially one that can also write the contacts to the SIM. (But since the Neo itself could do that, I guess it's no longer necessary.) Anyway the problem is not just the ability to copy some info from one SIM to another, but the fact that the SIM has an uncopyable unique serial number and maybe a hardware crypto engine (?). And the code for the GSM radio is not open-source. So there is no way to fake the SIM card. (This was meant to be a feature.) But it might be possible to emulate a SIM card in hardware, in such a way that different images could be used at different times; I don't know of any attempts to do that, but it seems like it should be possible. Then again, maybe there is a truly private key that cannot be read at all, but can only decrypt data that has been encrypted with the corresponding public key. Or you could try one of the SIM card duplexers that are sold (I never did... not sure how well they work). Those are meant for people who travel a lot, to be able to switch to a different SIM without physically swapping it out each time. If the point is to clone a SIM card, I'm sure that would be considered fraudulent, and might play havoc with the network too if they see the same phone signing on to a couple different cell sites. _______________________________________________ OpenMoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community