Unlock status

With iOS 4.3.5 currently available unlocking a 3GS model is still possible, but with a challenge. Version 4.3.5 can be jailbroken but the jailbreak is a tethered jailbreak. A tethered jailbreak is one in which the jailbreak program must be run against the iPhone every time the iPhone is restarted. The iPhone is unusable until the jailbreak program is re-run against the iPhone.

This situation is unacceptable, in my opinion, so I don't recommend it. Instead, I recommend ( for the 3GS ) that it first be downgraded to iOS 4.1 ( a rare ability, the downgrade ). Then a "good" jailbreak can be performed, and then the iPhone can be unlocked ( iPad baseband is still the only unlock option if your iPhone 3GS starts out on iOS 4.1 or higher ).

For the iPhone 4, if it is on iOS 4.1 or higher, the hardware unlock solution mentioned in the previous post is still the only option available.

Note that no one is talking about what is available for iOS 5.x ( though I have read that a tethered jailbreak currently works with beta versions of iOS 5.x ).

That's it for now.