Guide: How to Unlock iPhone 4 / 3GS on iOS 4.3.1 with Ultrasn0w [Guide]

A few hours ago iH8Sn0w (Hacker And Developer) has released a new version of Sn0wbreeze i.e Sn0wbreeze 2.4b1, this new version lets you jailbreak your device on iOS 4.3.1 and after jailbreaking with Sn0wbreeze you'll also be able to Unlock (On Older Basebands) iPhone 4 and iPhone 3GS with Ultrasn0w. Here we have posted a guide on how to Unlock after jailbreaking:

Read the Following Points before you proceed to UltraSn0w:

• This Guide works only for Baseband  (01.59.00 / 04.26.08 / 05.11.07 / 05.12.01 / 05.13.04 / 06.15.00)
• All those with (02.10.04 / 03.10.01 / 04.10.01 / 05.14.02 / 05.15.04) basebands should stay away from this guide.
• Upgrading iPhone 3GS baseband to the 06.15.00 iPad baseband hack to unlock MAY cause you to lose your GPS!
• There is NO unlock for the stock iOS 4.3.1 (latest baseband) yet. If your iPhone relies on a unlock, DO NOT update to stock iOS 4.3.1 yet.
• Sn0wbreeze 2.4b1 is a tethered iOS 4.3.1 jailbreak for iPhone, iPad and iPod touch.

Note: You have to Jailbreak your Device with The latest Sn0wbreeze 2.3, if you do it with other Jailbreaking tool(Greenpois0n, PwnageTool). The Unlock won't Work!!!

Also You have to make sure that your iPhone 3GS running on BB 05.14.02  or 05.15.04 should be Updated to 06.15.00. If it's not then just follow here to do so.

Step 1: Download the Latest Sn0wbreeze Here.

Step 2: Jailbreak your iPhone 4/3GS on iOS 4.3.1 with Sn0wbreeze, Here's How to. (It's same like iOS 4.3)

After the Jailbreak is Done, Now Let's Start Unlock:

Guide: How to Unlock iPhone 4, 3GS running iOS 4.3.1 with Ultrasn0w, old baseband:

Step 1: First of all Go to "Cydia" then "Manage Tab"

Step 2: Now Go to "Sources" then Click "Edit" and click "Add"

Step 3: Now Write,

http://repo666.ultrasn0w.com

And then click "Add Source"

Step 4: Once the Repo has been added, Just search for "Ultrasn0w" in Cydia and Install it.

Step 5: Click Install, And then Restart your iPhone.

Congratulations, It's Unlocked!

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