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Unlock iPhone 4, 3G, 3GS iOS 4.0 / 4.0.1 With Ultrasn0w 1.0-1

As promised, iPhone Dev Team has released their much awaited version of Ultrasn0w (v1.0-1) which can unlock iPhone 4 running iOS 4.0 / 4.0.1 with 01.59.00 baseband and iPhone 3G, 3GS with 04.26.08, 05.11.07, 05.12.01 or 05.13.04 baseband version. Once you have jailbreaked your iPhone by using JailbreakMe, you can follow the step-by-step procedure below to unlock your iPhone 4, 3GS, 3G.

NOTE: If you are unsure about the baseband version of your iPhone, you can view it by navigating to Settings->General->About->Modem Firmware. Moreover if you are on T-Mobile US, then you must disable 3G before unlocking your iPhone with Ultrasn0w (v1.0-1).

If you haven't jailbreaked your iPhone yet, you can follow our step-by-step guide to jailbreak iOS 4.0 / 4.0.1 on iPhone 4, 3G & 3GS with JailbreakMe 2.0. Once you are done with jailbreaking, you can follow the steps below to unlock your iPhone.

Unlock iPhone 4 on iOS 4.0 / 4.0.1 With Ultrasn0w 1.0-1

  1. Open Cydia on your jailbroken iPhone / iPod Touch.
  2. Ultrasn0w 1.0-1 Unlock

  3. Click on the Manage tab at the bottom.
  4. Ultrasn0w 1.0-1 Unlock

  5. Click on Sources section.
  6. Click on Edit button at the top left of Cydia.
  7. Click on Add button at the top right of Cydia.
  8. Enter as Cydia/APT URL and click on Add Source button.
  9. Ultrasn0w 1.0-1 Unlock

  10. Cydia will now automatically update your sources by following a series of automated steps.
  11. Ultrasn0w 1.0-1 Unlock
    Ultrasn0w 1.0-1 Unlock

  12. Thats it! Now click on the Search tab at the bottom and search for ultrasn0w 1.0-1
  13. Ultrasn0w 1.0-1 Unlock

  14. Click on ultrasn0w 1.0-1 and install it!
  15. Ultrasn0w 1.0-1 Unlock

Thats it! Enjoy your fully jailbroken and unlocked iPhone 4. If you still have any confusion, check out the video tutorial below:

[Video via TechTechManTV, via Twitter]

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