Unlock iPhone 4 and iPhone 3GS Using Ultrasn0w 1.2.1 [Step-By-Step Guide]

Then iPhone Dev Team already released the latest version of Ultrasn0w iPhone carrier unlock tool with iOS 4.3.1 support to unlock jailbroken iPhone 4 and iPhone 3GS with old baseband version.
Here’s the official announcement of the iPhone Dev Team regarding their new software:

We’ve pushed out the 4.3.1 compatibility fix for ultrasn0w in Cydia — it’s now at version 1.2.1. If you’re not already at 4.3.1 and you need the unlock, please be sure you understand how to get to 4.3.1 using a custom IPSW that doesn’t update your baseband.

This isn’t a new unlock! It’s to allow those who are already unlocked to use FW 4.3.1. It also fixes the signal bar issue for those who aren’t using the unlock but retain an older baseband intentionally.

AFTER INSTALLING ULTRASN0W 1.2.1, PLEASE REBOOT YOUR iPHONE using the normal “slide to power off” swipe. T-Mobile users in the USA also should disable 3G mode in Settings->General->Network.

ONLY Supported basebands: (01.59.00 / 04.26.08 / 05.11.07 / 05.12.01 / 05.13.04 / 06.15.00.

As quoted above, Ultrasn0w 1.2.1 is not a new unlock and it will not unlock new baseband, but it does allow you to maintain your carrier unlock while upgrading to jailbroken iOS 4.3.1 using PwnageTool 4.3 for Mac Os X or Sn0wbreeze 2.5.1 for Windows to preserve the unlockable baseband of the device.

The new UltraSn0w 1.2.1 has capability to unlock iPhone 4 and iPhone 3GS on baseband 01.59.00, 04.26.08, 05.11.07, 05.12.01, 05.13.04, and 06.15.00. iPhone 3GS user need to update the baseband of their device to iPad’s 6.15.00 in order to unlock. So any baseband that is not listed here is not unlockable. You can check the baseband version of your iPhone 4 or iPhone 3GS Settings -> General -> About.

You can follow our step-by-step guide on how to unlock iPhone 4 and iPhone 3GS using Ultrasn0w 1.2.1.

Unlock iPhone 4 and iPhone 4 and iPhone 3GS with Ultrasn0w 1.2.1

Step 1: First, you need to jailbreak the iOS 4.3.1 on your iPhone 4 using PwnageTool 4.3  (tutorial) for Mac Os X or with Sn0wbreeze 2.5 (tutorial) for Windows.

Step 2: Once jailbroken, you can now unlock you iPhone 4, 3GS with Ultrasn0w 1.2 from Cydia. Launch Cydia application on your jailbroken iPhone, then select “Manage” and tap on “Sources”.

Step 3: Select “Edit” and tap on “Add” and type the following repository address in the sources field:

http://repo666.ultrasn0w.com

Step 4: Tap Add Source and wait for it to upgrade.

Step 5: Now make a search for Ultrasn0w 1.2.1 (its zero (0) not an O) in the Search tab at the bottom. Tap it and press Install at the top.

Step 6: Wait for it to install and then re-spring or reboot your iPhone. Done!

That’s it. You have successfully unlock your iPhone 4 and iPhone 3GS using Ultrasn0w. You can now use it with any mobile phone carrier you want!

iPhone Unlock Update: Ultrasn0w iPhone 4 Unlock on iOS 4.2.1 and iOS 4.3 Not Yet Ready

Back in January, we reported that the iPhone Dev Team had announced that the official and highly anticipated unlock solution for the iPhone will be released at least a week or two after Apple releases the final version of iOS 4.3 for iPhone iPad, an iPod Touch.

So if you are one of the million iPhone 4 users who are anxiously waiting for the iPhone Dev Team to release the latest version of Ultrasn0w carrier unlocking tool (Ultrasn0w 1.3) to unlock iPhone 4 on iOS 4.2.1 or on iOS 4.3, which was released recently then we have some bad news for you.

MuscleNerd of the iPhone Dev Team has just announced via tweet that iPhone 4 unlock solution is not yet ready, and they still need more time to work things around.

Here’s what MuscleNerd tweets:

“Sorry, there's no news on the i4 unlock for those who lost 01.59 (or never had it). It's taking longer than we wanted :("

Meaning, there’s still no unlock solution for iPhone 4 with baseband 03.10.01 and 02.10.04 (for iOS 4.2.1 and iOS 4.1 respectively). If you’re wondering regarding the iPhone 4 unlock method that Dev Team talked about backed in January then looks like it was SIM dependent:

“there's no way for us to know. We were making great headway with one version til we realized it was SIM dependent (!)”
“I mean dependent on particular SIM :) I have two T-Mobile SIMs, and it behaved different on each (we understand why too)”

The best thing you can do is to buy a factory unlocked iPhone on eBay or other grey market because Apple will keep making it difficult to unlock their iPhone.

Using Limera1n to Jailbreak iOS 4.0 and 4.1 on iPhone 4, 3GS, iPad and iPod Touch

If you have an iPhone, iPad or iPod Touch that is operating on the iOS 4.0 or 4.1 then you will be delighted to hear that Geohot has released the Limera1n tool. This was formerly known as GreenPois0n and it can be used to jailbreak the iOS 4.0 and iOS 4.1. This new tool can be used on the iPhone 4, iPhone 3GS, iPad, iPod Touch 3G and 4G. The new Limera1n is an untethered jailbreak and it can be used for all the services that have been listed above. At the moment this jailbreaking tool is only available for use on Windows but according to the information obtained form www.limera1n.com it will be available for both Mac and Linux in the near future.

This is what the official Limera1n website has to say:



There were some issues with Limera1n on its release and some fo these have been fixed already including the new bootrom on Cydia with the iPhone 3GS and the fact that some devices did neet to reboot in order ot see the Cydia icon. I have listed the remaining issues below.
• Limera1n is only available for windows at the moment. A linux version is to be released shortly. There is no word on a Mac version as yet.
• iOS betas 1, 2 and 3 are not supported with this tool.


Limera1n Supported Firmwares:

• Stock iOS 4.0 for the iPhone 4, 3GS and 3G and the iPod Touch 2G and 3G
• Stock iOS 4.1 for the iPhone 4, 3GS and 3G and the iPod Touch 2G and 3G
• Stock iOS 3.2.2 for the iPad in both Wifi and 3G

Limera1n Supported Devices

The new Limera1n jailbreaking tool supports the follow devices:

• iPhone 4
• iPhone 3GS on both the old and new bootroms
• iPhone 3G is coming soon
• iPod Touch 4G
• iPod Touch 3G
• iPod Touch 2G coming soon

The Limera1n tool is sure to be a massive success with all Apple device users and for further information on how to download Limera1n all you have to do is visit their official website.

Unlock iPhone 3.1.3 Using Ultrasn0w

Unlocking iPhone’s has become extremely popular. People want to have more control over how they use their mobile phones. They want to have control over the carrier that they use and by using the unlock iPhone 3.1.3 tutorial that is listed below you will have this control.
The unlock iPhone 3.1.3 tutorial can be used on the iPhone 3G and 3Gs and the application that is being used in this tutorial is ultrasn0w. The tutorial is laid out in step by step format so you should have no trouble following it.
Unlock iPhone 3.1.3 3G and 3GS
Sn0wbreeze 3.1.3 which has been designed for windows allows owners to jailbreak their iPhone 2G, 3G and 3GS. By doing this you will be able to preserve your older baseband whilst still upgrading to the latest iPhone OS firmware. This means that you will be able to unlock iPhone 3G and 3GS using the current version of ultrasn0w.
All you have to do is follow the simple step by step instructions that are laid out in this unlock iPhone 3.1.3 tutorial.

Step 1:
The first thing that you have to do before you can unlock iPhone 3.1.3 firmware is to jailbreak your iPhone. There are detailed tutorials on how to do this and you can find them easily online. There is also excellent software available that will allow you to jailbreak your iPhone. You cannot unlock your iPhone until you have it jailbroken. Jailbreaking will allow you to use third party applications such as Cydia on your iPhone.

Step 2:
Once your iPhone has been jailbroken you need to start Cydia. When this application opens you need to hit the manage button which is located at the bottom of the screen. After this you need to hit the sources button. I do need to point out that if you are a T-mobile customer you have to disable 3G before you can install ultrasn0w which is the application that we will be using to unlock iPhone 3.1.3. You will find the setting for this in your device so make sure that this is done before you attempt to run ultrasn0w.



Step 3:
On the sources screen you need to hit the edit button and then the add button. A box will appear that will ask you to enter Cydia/APT URL. You have to type in http://repo666.ultrasn0w.com and click the add source button. (see screenshot below) Cydia will now automatically update your sources.



Step 4:
Once the repository has been added and you have received the successful notification you should hit the return to Cydia button. Now you have to search for ultrasn0w in Cydia and hit the install button for this application. This will be installed automatically onto your iPhone and the latest version of this application will unlock iPhone 3.1.3 for you.

Step 5:
Once ultrasn0w has been installed on your iPhone you will need to power off your device. You can then reboot your device and the ultrasn0w application will automatically start to unlock iPhone 3.1.3. You will then be free to use your device with any carrier that you choose.