Unlock iOS 4.3.1 On iPhone 4 3GS With Ultrasn0w Fixer

by casey on April 6, 2011

As we have already told you about Ultrasn0w fixer for iOS 4.3.1 unlock on iPhone 4 and iPhone 3GS on older basebands. The fix�is developed by msft_guy and iH8sn0w. Get the HOW TO GUIDE after a break.

If you are unaware,�Ultrasn0w was previously unable to unlock iPhone 4 and 3GS devices after�untethered iOS 4.3.1 jailbreak. But now you can use�Ultrasn0w 4.3.1 fixer to unlock your device. DO NOT take it as a new unlock tool, it can ONLY UNLOCK basebands�01.59.00 / 04.26.08 / 05.11.07 / 05.12.01 / 05.13.04 / 06.15.00.

Pre-Requisites:

You need to have a jailbroken iOS device in order for iOS 4.3.1 unlock to work. You can jailbreak your device using�Redsn0w 0.9.6 RC9,�PwnageTool 4.3 or�Sn0wbreeze 2.5.

How to Guide To Use Ultrasn0w fixer for iOS 4.3.1 to Unlock iPhone 4 and 3GS

Step 1: Launch Cydia in your jailbroken iPhone 4 or iPhone 3GS

Step 2: �Navigate to “Manage” and then “Sources”

Step 3:

Now��Edit� and then �Add�.
Type the repo: “http://cydia.pushfix.info”
Now �Add Source�

Step 4: Now press “Done”.

Step 5: Now select �”Pushfix.info” to Install it.

Step 6: Once its done with installation. Go to�Pushfix.info. Scroll down to find��Ultrasn0w fixer for 4.3.1�. Select and to install the package. After that it will restart your device.

Thats it! Congratulations! Your device is now unlocked on iOS 4.3.1 on basebands�01.59.00 / 04.26.08 / 05.11.07 / 05.12.01 / 05.13.04 / 06.15.00. Kindly DO NOT use it other than the mentioned basebands.

UPDATE: Those who are still facing issues after using Ultrasn0w Fixer, iPhone Dev Team has updated:

Ultrasn0w 1.2.1 Unlock iOS 4.3.1 iPhone 4 and iPhone 3GS

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{ 7 comments… read them below or add one }

Skelalex April 6, 2011 at 1:26 am

hi all, need help. i have iphone 4, bought in states, iOS 4.0, was jailbroken. recently by mistake telephone was updated with iOS 4.3.1. baseband of the phone 4.10.01. Is there any chance that i can unlock carrier again? Coz now my wife can use it only at home connected wifi like a small ipad… please can somebody help me, any recommendations

Dominic April 7, 2011 at 3:06 am: No, your iPhone 4 is an expensive iPod Touch….however go to EBay and buy yourself a GEVEY UNLOCK SIM and that will unlock your phone, on 4.3.1 and BB 4.10.01
I am using it after having the same problem as you!

Ljupcho Palashevski April 7, 2011 at 12:49 am