How To Unlock iPhone 4, 3GS On iOS 5.1 Using Ultrasn0w Fixer
Apple has released the update version of iOS 5.1 to public which brings both delight and pain to members of the Fruit company product loving world. On the other hand, the Cupertino company has just released its brand new and upgraded version of iPad which is going to hit the market in less than a week. With the released upgrade to iOS 5, taook us to version 5.1, along with the redesigned Apple TV unit. iPhone Dev Team has released the tether jailbreak Redsn0w tool for those who love to be jailbroken their iOS devices, and perform a software based carrier unlocks on their iPhone find themselves in turmoil.
Why Apple released the new iOS 5.1? It’s the game with Apple and hackers, more likely closing any previously used vulnerabilities in earlier versions of the OS, leaving jailbreak development teams looking for an alternative way to bypass their restrictions. Confuced, if you rely on a software unlock in a quandary, as upgrading to a stock version of the newest iOS would also update their baseband, removing the effectiveness of the Ultrasn0w unlock tool.
Before iOS 5.1 release, iPhone Dev Team warned users on their official blog about the dangers of blindly updating to iOS 5.1 firmware, also advised that if they require an Ultrasn0w unlock, to make sure that they update via custom built IPSW (which can be done with Redsn0w performing preserving baseband while jailbreaking).
The Dev Team have also announced that Ultrasn0w itself will be benefitting from an update in the next few days, which will bring support for the iOS 5.1 firmware. The said update will be getting good news to unlockers, unfortunately will not bring any additional basebands support and will only offer the ability to unlock devices and basebands (older) which are currently offered by the 1.2.5 version of the Ultrasn0w tool. What are the supported baseband models currently:
A developer known as zmaster has you covered. He has released a tool on his own repository that goes by the name of ‘Ultrasn0w Fixer‘, with no prizes for guessing what it does. That said package is designed to be ab interin fix for Ultrasn0w, means those devices running iOS 5.1 can install the Fixer package in the first step, then install the current version of Ultrasn0w which will provide the necessary unlock till the device and basebands supported.
This particular Ultrasn0w fixer package is modified from an earlier version from a different developer and can be installed by following a couple of simple steps.
Important Note : In order to follow the instruction your iPhone must be jailbroken on iOS 5.1 using custom firmware with old baseband preserved, which can be found posted here. For jailbreaking the latest iOS 5.1 (Semi-tethered/tethered), follow these instructions posted here to jailbreak using Redsn0w or by using Sn0wbreeze jailbreak tool for Windows.
Get downloaded and Installed the Ultrasn0w Fixer
Step 1 : Launch Cydia and select the ‘Manage‘ tab from the tool bar at the bottom of the application. Select ‘Sources’ from the resultant list.
Step 2 : Tap the “Edit” option in the top right hand corner of screen before selecting the “Add” button on the left hand side of the tool bar.
Step 3 : In the pop up alert view enter the repository URL which is ‘http://repo.iparelhos.com‘, then press ‘Add Source‘.
Step 4 : When the repository refreshes and finishes loading sources, tap on the repo name in the sources list which will display the Ultrasn0w Fixer utility.
Step 5 : Select the Fixer utility, pressing ‘Install‘ in the top right hand corner. Confirm the installation and then wait for the process to be completed.
Step 6 : After the Fixer package completes, now install the current Ultrasn0w 1.2.5 software. Select the “Search” option from the Bootrom of Cydia, just type in “Ultrasn0w” and hit the “Search” button.
Step 7 : When the Ultrasn0w tool appears, select it from the table and then select ‘Install’ as per step 5. After the installation has been confirmed and processed, the device should be unlocked as long as it meets the hardware and baseband requirements.
This post was actually published by Redmondpie and they wrote a side note:
“it is worth mentioning that the developer has stated that the Ultrasn0w Fixer tool must be installed prior to the Dev Team’s Ultrasn0w being installed upon the device.”