My iphone is already jail broken with firmware 1.4.1, i tried upgrading to ver 2.0 and the phone is now locked saying that the sim is not recognised and needs the correct sim to register. Could you educate me on some issues here, is it that the phone is successfully upgraded to 2.0 and only needs unlocking or needs jail breaking again because I am totally ignorant to that term. Thank you all for your kind support. Hi all...