3GS unlocking: download through Cydia

November 28, 2010 by Brian

Ultrasn0w 1.2 for iOS 4.1 and 4.2.1 (in some cases) is now available to download from the iPhone Dev Team.

This free iPhone hack enables you to unlock iPhone 3G/iPhone 3GS basebands 04.26.08, 05.11.07, 05.12.01, 05.13.04 and 06.15.00, iPhone 4 on 01.59.00 as well as the iPad on baseband 06.15.00 (that’s iOS 3.2.2).

So in reality only iPhone 3G and iPhone 3GS devices can be unlocked on iOS 4.2.1, while iPhone 4 owners will need to wait for a while to get an unlock for this firmware version.

Before you can use Ultrasn0w to unlock your idevice, you will need to download the latest version of pwnage tool or the latest version of redsn0w to jailbreak it.

UPDATE – READ THIS!!!! Warning: Ultrasn0w 1.2 iPhone baseband 06.15.00 unlock might break GPS capabilities

And below are the official release notes from the iPhone Dev Team, make sure you read them to understand everything.

SIMPLIFIED VERSION:

1. Read and fully understand the warning below.
2. If you have an old-bootrom 3GS and are already unlockable but want to get to 4.2.1, please wait til we release an “unofficial” bundle for you. Read no further.
3. Read update #1 for an updated 3GS bundle.
4. Download this IPSW
5. Run PwnageTool to create a custom 4.1 IPSW. Tell it you want to use the iPad baseband you just downloaded. Restore to this custom IPSW.
6. Install ultrasn0w through Cydia
7. Enjoy!
8. If you don’t have a Mac, redsn0w will be released within a few hours to handle this.

Update #1: There’s an error in the bundle for the iPhone3GS 4.1 that prevents the new baseband from being used. If you know your way around OSX, please download the fixed bundle, and unzip it if Safari hasn’t already done so. Then “Show Package Contents” of PwnageTool.app, navigate to Contents->Resources->FirmwareBundles and drop it there. Otherwise, please wait for the updated PwnageTool, or the OSX version of redsn0w coming soon.

FULL VERSION:

Since 06.15 is a higher version than 05.14 or 05.15 (where AT+XAPP is gone), anyone stuck at those versions can simply upgrade to 06.15 to unlock again! Luckily for us, Apple *still* provides the iPad FW 3.2.2 with this vulnerable baseband right from their own servers. (Grab it now, before they take it down!)

We’ve been busy updating both PwnageTool and redsn0w to make the baseband update as seamless as possible.

1. First up is “PwnageTool 4.1.3 Unlock Edition”. It has a special dialog box which will ask you if you want to update to the iPad baseband. You must already have the iPad 3.2.2 IPSW on your computer (see the above link)….so just point PwnageTool at it (or let it find it on its own if you’re in “simple” mode).
2. Directly after PwnageTool 4.1.3 is available, the official ultrasn0w repo http://repo666.ultrasn0w.com will be updated with ultrasn0w 1.2, which covers iPhone 4 baseband 01.59.00 and iPhone 3G/3GS basebands 04.26.08, 05.11.07, 05.12.01, 05.13.04 and now 06.15.00.
3. Finally, we’ll release an update to redsn0w today for those without Macs and can’t run PwnageTool. The new redsn0w will give you the option to update your baseband to 06.15 too.

WARNING — YOU DO THIS AT YOUR OWN RISK! PLEASE UNDERSTAND THE CONSEQUENCES OF UPDATING TO 06.15.

1. There is no way to come back down from 06.15, and there’s no hiding the baseband version from Apple. You’ll be voiding your warranty in a very obvious way.
2. If some future baseband comes out with a critical fix, you won’t be able to update to it if it remains down in the 05.xx sequence (then again, you wouldn’t update to it if you wanted to keep your unlock anyway).
3. Starting with FW 4.2.1 if you have 06.15 on your iPhone you won’t ever be able to restore to stock firmware (it will fail). You’ll need to only restore to custom IPSWs (then again, if you’re unlocker you should already be doing that).

Certainly don’t update to 06.15 if you don’t need to! Only do this if you need the unlock and you’re stuck on 05.14 or 05.15, and you’re willing to assume the above risks.

NEED A GUIDE FOR ULTRASN0W 1.2? SEE:
- ULTRASN0W 1.2 + REDSN0W 0.9.6B5 UNLOCK VIDEO GUIDE
- ULTRASN0W 1.2 + PWNAGE TOOL 4.1.3 UNLOCK VIDEO GUIDE

Tags: baseband, firmware, hack, iOS, iOS 4, iOS 4.1, iOS 4.2.1, iPad, iPhone, iPhone 3G, iPhone 3GS, iPhone 4, iPhone Dev Team, jailbreak, OS, tool, Ultrasn0w, Ultrasn0w 1.2, unlock

Article by Brian

My name's Brian, Brian Jones. I'm a professional in my thirties and I'm really into technology. I enjoy playing with new mobile phones and other gadgets. iPhone and iOS fascinate me as does the future of mobile computing.

Fahim Chowdhury

When is the unlock for 3GS baseband 5.14.02 due? I do not want to update to 6.15.
Shyam

When will the unlock for iPhone 4. 2.10.04 baseband be available?
Vidzqui723

Can baseband 5.11.07 be unlocked without updating to 6.15 using this method?
Iliasgreece

i have problem..I have 3gs 4.2.1 with new bootrom, i use redsnow and i change bootrom 6.15 .. problem is iphone stuck on DFU mode and i try with recboot and tinyumbrella but nothing.. i try itunes for restore again nothing.. pls help
meghav

wen wil the unlock for 4.2.1 baseband 5.15.04 be available????
some1 plzzzz tell me…
Govinda_ale

Ima from nepal.Ihave i phone 4 g 4.2.1 verson.when do we get unluck softwere?
Krthebear

i would like a step by step guide on how to jailbreak/unlock or what ever you have to do to put a P.A.Y.G micro sim in my iphone4. 4.1, 02.10.04 {oh yeah pwnage tool} whats all that about. Ok by now you have realized im not the sharpest tool in the box {im just a tool} but im not to bad at following instructions. please, please, pretty please with a f#@k cherry on the top can someone help me. you will have my eternal gratitude and some £££ if it works and if you tell me where to send it… come on there must be someone out there in this big wide world. once again cheers peeps!!!
Amphalla84

I download this Pwnage Tool 4.1.3 [iOS 4.1 / 4.2.1 iPhone Unlock Edition] and i fallow all step but i think something wrong it and now my iphone 4 does not display anymore can help me how to solve that?