I have followed instructions posted on this forum for unlocking my iPhone 3G. Unfortunately, they have not worked. The instructions state that the I need modem firmware 05.13.00 or 06.15.00. As my title shows, I have neither and suspect that this is the reason that the procedure will not work. The phone was Jailbroken using the Cydia system. Can someone tell me please how to unlock a phone that has the modem firmware noted in the title of this message. The phone is a Canadian phone locked to the Rogers network. I have an AT&T Sim but the phone will not find the network. Thank you.