I have an iPhone 3GS which is locked on the AT&T network. It was jailbroken before and after I clicked "Erase all settings", it won't boot up. Now I'm thinking to upgrade to latest iOS 5.1 and I have some questions:
- is iOS 5.1 slow on the 3GS? I just don't want to upgrade just for the sake of upgrading so if an older iOS version would fit better, I'll just take an older firmware.
- can I easily unlock and jailbreak with 5.1?