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Ultrasn0w now ready to unlock your iPhone 4

Written by Andre Yoskowitz (Google+) @ 04 Aug 2010 19:49 User comments (2)

Ultrasn0w now ready to unlock your iPhone 4 As promised last month, the iPhone Dev-Team has now released their iPhone 4 unlocking tool, Ultrasn0w, which can be used by U.S. owners tired of being stuck on AT&T.
The carrier unlock required a complete rewrite of the software because of Apple's new baseband OS for the updated phone.

It is important to note that users who unlock their iPhone 4 can use T-Mobile's cell network but not its high-speed 3G data.

Ultrasn0w 1.0 comes with instructions, courtesy of RedmondPie:

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”

-Touch on “Edit” and then on “Add”. You will be prompted to enter a url source as seen in the screenshot below. Type “” 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.

As with all unlocking and jailbreaking guides, please use caution as there is always a chance of messing up your device.

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2 user comments

14.8.2010 23:01

Just tried it out and I gotta say it works pretty great.

27.8.2010 16:55

Originally posted by xiaoa:
wow,cool,the DEV-team ,you are my idol!! my iphone 4 has been waiting for a long time,after unlock, i also can jailbreak my addition, I heard that, after jailbreak, Facetime and MMS will be affected, do not know to watch movie function
will be affected? whether the other ware like ANEESOFT video converter will be affected or not? I'm very concerned about this,
because I am a movie fan.

i heard they might have fixed the issues, but im not sure, just heard it from a random person online

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