If you are on baseband 05.14.02 on your iPhone 3G Ultrasn0w won’t help you. You need to update your baseband using this tutorial for carrier unlock. We will use the iPad Firmware file to update the baseband and jailbreak using PwnageTool. Instructions and screenshots after the break.
We told you about Dev-Team’s release of PwnageTool 4.2 yesterday. Here’s the full tutorial to Untethered Jailbreak iOS 4.2.1 using a Mac computer. If you have already jailbroken your iPhone 4 using Greenpois0n then you don’t need to jailbreak again. The advantage of PwnageTool over Greenpois0n is that it preserves your baseband and Ultrasn0w unlock.
This guide will help you jailbreak iOS 4.2.1 on your iPad using Greenpois0n for Mac. You will then be able to install Cydia and use third party applications on your iPad apart from the App Store games and applications approved by Apple.
This guide will show you how to jailbreak iOS 4.2.1 on iPad Wifi or 3G model using the Greenpois0n tool on your Windows Computer. As you might have already heard Greenpois0n update has been released for Mac and Windows to jailbreak any device running iOS 4.2.1.
This guide will help you perform an iOS 4.2.1 untethered jailbreak on your iPhone 4 and also unlock it if required. We will be using Greenpois0n’s latest release to jailbreak iPhone 4 using a Mac computer. Please note that Unlock is only available to iPhone 4′s at baseband version 1.59.00