Unlock iOS 4.2.1 – iPad, iPod Touch and iPhone 4

MuscleNerd the iPhone Dev Team has twittered that they will be released ultrasn0w IOS 4.2. Before you begin to unlock Apple's device uses UltraSn0w you need to jailbreak your device and the baseband (modem firmware) should be in 4:26:08,, 5:11:07 5:12:01, 05 : 13:04 or 01.59. After unlocking the iPhone, you'll be able to use the phone with a GSM carrier of your choice.
For the new iPhone 3G and iPhone 4 users, this version now requires a computer to boot to a jailbroken state. The iPhone-Dev team to work with the Comex @ untether the fix that the iPhone jailbreak fourth time for all. Unlockers ultrasn0w can expect a new version for iPhone 3G and iPhone 3G at the beginning of next week. IPhone four of the box with a new baseband 2:10:04 so you'll have to wait a little longer until the hackers figure and change ultrasn0w also unlock the latest iPhone models IOS or IOS 4 , 2 4.1
All IOS devices have recently jailbroken through a combination of exploitation can past, including pwnage2, arm7_go, 24kpwn and limera1n Geohot is. Jailbreak solution will now work to update the hardware Apple iPhone.
Here's what you need to do to unlock iPhone 4.1 using UltraSn0w. This works for iPhone 3G and iPhone 4 iPhone 3G.

•  Step 1: Make sure you are still 4 or IOS IOS 4.0.1.
•  Step 2: Jailbreak your iPhone using PwnageTool.
•  Step 3: Go to Cydia and search UltraSn0w. Download and install UltraSn0w.
•  Step 4: Restart your iPhone. Done.