Carrier Unlock iOS 4.0.1 On iPhone 3G Using RedSn0w

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Got an iPhone 3G running iOS 4.0 and just saw the iOS 4.0.1 update? Applied the update already and now wondering how to carrier-unlock your phone? As always, we’ve got you covered. In what follows, we will show you how to successfully unlock your iPhone 3G on iOS 4.0.1 to be able to use it with any carrier SIM of your choice. For more information and our complete instructions, read on.

While the subject of carrier-unlocking your phone may be controversial, it has many legitimate use scenarios. There may be cases where you want to stick to the same carrier as your primary carrier, but want to use another carrier’s SIM card as a secondary one in parts of your town or place where you don’t get good coverage on your primary carrier. Another case might be when you are in another part of the country where another carrier has better coverage and your carrier has none or poor signals there. Yet another and perhaps the most important scenario would be international roaming – while travelling abroad, most of us prefer to use a prepaid local connection of the country we’re in, to avoid huge international roaming charges.

Earlier today, Apple released the new iOS 4.0.1 update to its devices. This update actually doesn’t seem to do much, other than changing the signal bar display on the phone. There may be some other minor changes, but nothing major has changed. In case you have already updated your iPhone to iOS 4.0.1 and have done the jailbreak, you can now carrier unlock the handset using UltraSn0w. The reason behind this fast unlock is that being a minor update, the new iOS 4.0.1 does not change the handset’s baseband, meaning you can use the already available Ultrasn0w version to carrier unlock your phone.

Here are the step by step instruction on how to unlock jailbroken iOs 4.0.1 on iPhone 3G.

  1. The first step is to launch Cydia on your iPhone 3G tap on Manage.
  2. Press “Edit” tab followed by the “ Add” tab.
  3. Next, type the follwing URL in the Add Repo field: http://repo666.ultrasn0w.com
  4. Now press the AddSource tab followed by pressing “Done”.
  5. Go to Cydia search and type “UltraSn0w 0.93”. Select UltraSn0w after it appears in search results.
  6. Finally, press “install” followed by confirming the installation, and wait for it to finish installing.

There you Go! You have now successfully carrier unlocked your iPhone 3G running jailbroken iOS 4.0.1 with UltrSn0w. Please note that this unlock is not applicable on iOS 4.1 developers-only version.

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