Our sister site, iPhone-Developers.com, has posted a rather interesting article regarding the new iOS update coming towards iPhone users. As it turns out, unlocked devices trying to upgrade to 4.2.1 will get locked on Recovery Mode and would not be able to use the device again until the device is restored via iTunes to an unlocked version of the OS:
Just yesterday, BigBoss got a tip that Apple had installed a baseband requirement for iOS, meaning that if you are running an unlocked phone and attempt to update to the latest iOS, you could get stuck in recovery mode until you restore to a regular version of the iOS via iTunes.
So what does this mean?
BigBoss recommends that unlockers stay as far away from iOS 4.2 as possible, even if for development.
If you’re not sure what unlocking means, then this won’t apply. Instead, I recommend that you readthis piece (oldie, but a goodie) on the difference between jailbreaking and unlocking before trying to make sense of what baseband and/or modems have to do with your iPhone.
You can find the whole article here._________