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Since Apple is selling unlocked iPhone 4s internationally, it is only the United States users who are still locked on AT&T network. So if you want to use your new iPhone 4 on networks other than AT&T, like T-Mobile for example, you can use this newly released Ultrasn0w 1.0 software to unlock your phone.
Simply follow the instructions posted below to unlock your iPhone 4 on iOS 4.0.1 / 4.0 on 01.59.00 baseband.
NOTE: T-Mobile US users will have to disable 3G by navigation to: Settings->General->Network and turning the "Enable 3G" switch to OFF before installing the ultrasn0w unlock.
How to: Jailbreak iPhone 4 on iOS 4.0.1:
Step 1: Unlocking requires that your phone is jailbroken on the latest firmware. Follow the complete guide posted here to jailbreak your iPhone 4 on iOS 4.0.1 / 4.0 using JailbreakMe 2.0.
How to: Unlock iPhone 4 (Any Baseband) on iOS 4.0.1:
Step 2: Once you are done with the jailbreak, you can now unlock your iPhone on any baseband using Ultrasn0w 1.0-1 from Cydia. To do this:
- Start “Cydia” on your iPhone.
- Touch on “Manage” tab on the bottom.
- Now touch on “Sources” as seen in the screenshot below:
- Touch on “Edit” and then on “Add”. You will be prompted to enter a url source as seen in the screenshot below. Type “http://repo666.ultrasn0w.com” and touch on“Add Source” to add this repo if you haven’t already.
Cydia will now automatically update your sources by following a series of automated steps.
- After installation is completed. Search for “ultrasn0w 1.0-1” in Cydia and install this application. This app will automatically unlock your iPhone so that you can use it with any carrier.
Step 3: Now simply restart your iPhone and voila! you should now have a fully unlocked iPhone 4 !
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