Hi there, I have just bought a 16GB 3GS from eBay, which was unlocked by jailbreaking. When I got it, it was running on 3.1.3. I have since upgraded it officially through iTunes to 5.1.1 with a BB of 05.16.05. Unfortunately, from some research, I now believe that this combination cannot be unlocked, but only jailbroken. (I've used redsn0w). As it is essentially an iPod Touch at the moment, can I go back to 3.1.3? Also, I am a bit scared about changing the baseband as I understand that it can damage your phone forever. I do want to officially network unlock it, but I don't know which network it is unlocked to. I have ordered loads of free sims to test it out, but they are not here yet! So, can someone please help? As I said, I want to network unlock soon and I don't want to jailbreak once this is done. Jailbreaking to unlock is only a temporary measure at the moment really!