I successfully jailbroke my iphone 3gs to 4.0.1 but the problem is that it is not allowing me to use my sim.
I have downloaded ultrasn0w but when i put my vodafone ireland's sim in it it says sim not supported and connect to itunes.. when i do itunes says ''The SIM card inserted in this iPhone does not appear to be supported. ONly compatible SIM cards from a supported Carrier may be used to activate iPHone. Please insert the SIM card that came with your iPhone or visit a supported Carrier's store to receive a replacement SIM card.''
Strangely I can receive calls and messages after using ultrasn0w but i cant make calls or send msgs since its stuck on emergency screen.
Please Help!