Everybody who owns an iPhone 4 running on iOS 5 Baseband 01.59.00 has now a reason to be happy because a new version of Ultrasnow has just arrived on the market. As you know, Ultrasnow is the right software if you want to remove all restrictions imposed by your carrier and unlock your device. Finally, Ultrasnow 1.2.4 is released for all of you who want to perform unlock on iOS 5 Baseband 01.59.00. The previous versions of the same software were not compatible with the latest iOS 5 released. Soon, developers released a proper version for the iOS 5. I must mention the fact that unlocking using Ultrasnow 1.2.4 is only for iPhone 4 with baseband 01.59.00.
For those of you who are still not familiarized their own baseband, you can easily check your phone in Settings, General and in the About section to see what your baseband is. However, before you start the unlocking process on iOS 5 on iPhone 3GS/4 using the Ultrasnow 1.2.4, you need to perform jailbreak on your device using Redsnow (for Windows or Mac) or Snowbreeze (for Windows only) in order to preserve the baseband. Another important note is the fact that you need to be quite careful when you choose to upgrade to iOS 5. For preserving the baseband, you need to choose a custom IPSW.
The unlocking process is quite simple. Here is what you need to do in order to unlock iPhone 4 on iOS 5 baseband 01.59.00 using the latest version of Ultrasnow and namely the 1.2.4 version.
1. One of the most important things in the unlocking process is jailbreak. For unlocking, you need jailbreaking. After you jailbreak your device, Cydia will be installed on your device.
2. Go to Manage/Sources/Add Source to add the source that contains the Ultrasnow 1.2.4. Here, add the repo666.ultrasnow repo and search the software.
3. Once you download and install Ultrasnow 1.2.4, launch the application.
4. The program will do the job by itself and you do not have to do anything. After this, restart your device and reboot in a tethered mode using Redsnow. That is it.
Those of you who are accustomed with this procedure, I am sure that you will do just fine. However, just in case, if you want to be safe and to keep your personal data secure, before starting jailbreak and unlock on your iPhone 4 on iOS 5, you should definitely backup your files using the iTunes or iCloud account.