All iPhone 4, iPhone 3GS and iPhone 3G unlockers, you are being forewarned to stay away from iOS 4.2.1 update. As per The Big Boss blog , Apple has implemented boot-level baseband signature check feature in the new iOS 4.2.1 update. That means if your iPhone doesn’t correct baseband moden number then it won’t boot. Apple is clearly blocking out the ability/hack to retain the old baseband version even if the latest iOS update is applied (more…)