[Fricassee]

sdr to do what ? ............................
maybe you talk about blade rf and rogue base gsm, because is a sim card inside the atm for comunication ?
Yes is possible to put down A5/1 cipher to A5/0 so traffic will be unencrypted ?
develop your method so we can progress all.....
with the blade rf is possible to comunicate with the sim over sms pdu.....
i never test on atm but with your post you begin to give me some idea XD XD XD