Unlock iPhone 4, iPhone 3GS on iOS 5

iOS 5 is the smartest iOS released so far by Apple, with more than 200 new features and enhancements. We know that you are pretty excited to get your hands on iOS 5. If you are not an unlocker, then we have a comprehensive guide on how to jailbreak iOS 5 on iPhone, iPad, and iPod Touch.

Note that the current iOS 5 jailbreak is tethered and is compatible with only iPhone 4, iPhone 3GS, iPad 1, and iPod Touch 4G/3G. iPad 2 owners will have to wait for a iOS 5 jailbreak, there is none available as of now. iPhone 3GS old bootrom users are pretty lucky; their jailbreak will be untethered!

Can you unlock iPhone 4 or iPhone 3GS on iOS 5?

Yes, you can unlock your iPhone 4 or iPhone 3GS on supported basebands using the latest version of Ultrasn0w.

What are the supported basebands?

You can unlock iPhone 4 on 1.59.00 and iPhone 3GS on any of the following basebands: 04.26.08, 05.11.07, 05.13.04, 06.15.00.

Basebands not yet supported

iPhone 4: 02.10.04, 03.10.01, 04.10.01

iPhone 3GS: 05.14.02, 05.15.04, 05.15.04, 05.16.01, 05.16.02

How to jailbreak iOS 5 on iPhone 4 without updating baseband?

iPhone unlockers SHOULD NOT update to iOS 5 firmware as this will result in upgrading of baseband and hence loss of unlock. If you have several times in the past upgraded your firmware without updating baseband, you may already be aware that PwnageTool and Sn0wbreeze (port of PwnageTool for Windows) are the two tools available for building custom iOS firmware.

However, this time, the iPhone Dev Team have not released a new version of PwnageTool. Instead, they have decided to put in the functionality into Redsn0w’s Mac version. Windows version of Redsn0w does not yet support custom firmware.

So, currently, Windows users have no option of jailbreaking their iPhone on iOS 5 without updating baseband. They should wait for an updated Redsn0w that supports custom firmware building on Windows platform. or take the help of a Mac friend!

Follow our guide on how to jailbreak iOS 5 on iPhone 4, iPhone 3GS without updating baseband.

Unlock iPhone 4, iPhone 3GS on iOS 5 using Ultrasn0w 1.2.4

Now that you have a jailbroken iPhone on iOS 5, you can simply go ahead and unlock your device with a few clicks.

1. Open Cydia on your jailbroken iPhone and tap on ‘Search’ tab.

2. Search for ‘Ultrasn0w’ and install the app. The current version is 1.2.4.

That’s it. your iPhone will now be unlocked and you can use it on any carrier you like.