I've gotten so many answers to this question that start with "I think..." I need a real answer. I'm on 1.1.2, have 3.9 bootloader, and the 04.02.13_G modem firmware. I am on AT&T, but not an iPhone plan. What do I need to do to get on 1.1.3 and use my existing plan? I did not ever need to unlock before, I don't think I should have to now. Last time I tried 1.1.3 I did the activate, jailbreak, and unlock on ZiPhone, and it gave me the "Incorrect SIM" error when I downgraded to any pre-1.1.3 firmware. This was before ZiPhone supported 3.9, I believe (Tuesday I think). Anyone know for sure what I will need to do? I'm using 1.1.2 with only YouTube searches and Most Viewed lists not working - bookmarks from previous restores will load the video.