Im fine with running 4.3.2 (And as i understand, you can't unteathered jailbreak the newest version, so i'm not really looking to update) normally, but ill be going on a holiday soon (staying in the country) and im switching carriers purely for the better coverage while im out. Some info: Jailbroken Phone 3gs, running 4.3.2 on baseband 05.16.02. Locked to optus, trying a prepaid telstra sim. I've had no issues with jailbreaking or cydia, but i can't seem to get unlocking to work. I'll install ultrasn0w and get a "Could not activate cellular data network" (which is meant to come up before you restart the iphone), but i get nothing after restarting the phone. NO service on the top bar, and a "unable to load network list" when i open "carrier" in settings. I've tried a second repo (hoping maybe the download was corrupted), but no dice. Could be a couple of things; Carrier settings, since i can't update, i may not have the latest ones. I understand 05.16.02. is a strange baseband for unlocking, is this true ? Phone just messing up because its been months since i last updated. A quick reply/solution would be appreciated, want to get this sorted out asap. Thanks for your help in advance, and sorry for failing at grammar.