sim

Hi all, Perhaps i am completely mistaken.. If so, please make it a "learning-moment" for me ;-) Is it possible to crate your own SIM's ? As far as i can see, these are just small smartcards. And as such, thse can be filled with the tools that come along with OpenSC. I presume the SIM's contain a number of EF's and DF's One set that thighs a SIM to a specific operator (making it possible to SIM-lock a handy) And another set of EF's that identifies a specific user. Within the DB of the operator, the relation between the SIM-identifier and the specific user (with his 06-number and other info) is made. (I know that the sim itself is not unique, because a college had a malfuntioning SIM, and it was replaced by another one, with the same content) Reason why i want to fill my own sims is this; For one of our projects we are using certificates on a smartcard. Currently full-sized, but we think of putting it on a sim-sized card. And use it in a dongle along with 2Gb (bootable) flash storage. So my questions are: 1) can you burn your own sim's 2) would there be any objections to have, beside de GSM-info, also a certificate 3) could you "clone" an existing SIM? With regard to the last one: If i buy a couple of prepaid-sims from a operator, would it be possible to extract that info, and put it along with my own certificates on a sim of my own? Obviously, it is no use to contact the help desks of kpn, tele2, or vodafone at this moment. But _if_ their are no technical limitations i could do a test with some of our own BTS'es. And if that pilot works, we have a business case for any interested operator. Hans