think he'd be better off with an imaginary virtual pc - where anything is possible
why in hell would you want to simulate a gsm connection, surely either want a connection or not - not to pretend to have one. there was a windows program that never moved from xp - for the life of me can't remeber what it was called but used it for setting of at commands and baud rates etc. may be able to do it with that.............but doubt it, think it's madness.