Shahid Sheikh wrote: > Ever since you posted your original message I've been wondering if it > would be possible to write device drivers for something like the Nokia > CardPhone to do what you want to do. All the essential RF paths should > be there in that cardphone as well (or are they?) I wouldn't bet on this. I once looked into hacking some Motorola iDEN units, and the problem I found with most cell units is that they transmit and receive on frequencies that aren't in the same range. I don't know if this holds true for GSM though. IIRC for AMPS the difference is 40MHz or so...but I'm not sure. Josh -- A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -Douglas Adams -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads