How to Update Your iPhone 4 Without Upgrading the Baseband (Windows) 4.2.1 with Help of TinyUmbrella
Since the new GreenPois0n RC5 iOS 4.2.1 Untethered Jailbreak tool by Chronic Dev Team is out all iPhone 4, iPad and iPod Touch owners / users can now jailbreak their devices even on the latest iOS 4.2.1
For those of us iPhone 4 users who are still on 4.0.1 or 4.1 and still would like to keep our unlock the basebands must remain at the same version or the iPhone will be bricked.
If you will update your iPhone to the latest iOS 4.2.1 your basebands / Modem Firmware will be updated as well and you will not be able to unlock your iPhone for the use on other carriers such as T-Mobile, Fido, Rogets, etc.
This tutorial will show you how to upgrade your iPhone 4 to 4.2.1 without upgrading its baseband using TinyUmbrella. Read more…