The iPhone Dev team has announced that their UltraSnow unlocking solution for the new iPhone 4 is now available for download. If you are one of those who hate being tied to AT&T – or any of the other locked carriers – this solution will now set you free.
To get started though, you will need to first jailbreak your iPhone 4. This is now possible with the recently released JailbreakMe browser-based iPhone jailbreaking tool. Once this is done, launch the Cydia app store and install UltraSn0w from there.
Do note that only a certain number of iPhone basebands are supported. That includes 01.59 for iPhone 4 along with 04.26.08, 05.11.07, 05.12.01 and 05.13.04 on iPhone 3G/3GS. If you are not able to locate the UltraSn0w tool on Cydia, add the repo666.ultrasn0w.com repository to get started.
Of course, Apple can void your warranty for attempting a jailbreak and so unless you are absolutely sure about what you are doing, do not attempt the unlock.