How To Unlock iPhone 4 on iOS 5.1 With Gevey SIM [Video]
Here’s how you can be unlocking your iPhone 4 device running on iOS 5.1 with the help of Gevey SIM unlock tool. Apple has released the latest version of 5.1 firmware in the New iPad media event held a couple of days ago. If you are interested to unlock iPhone on 5.1 with the Gevey SIM then here are some details about that.
Simply by following the step by step guide, you can use Gevey SIM to unlock iPhone 4 on unofficial carrier and runs on iOS 5.1. Details are below to get started right now.
The unlockers know that Gevey SIM can only unlock iPhone 4 on specific basebands, so you have to update to custom firmware when you are upgrading to the latest iOS firmware. As a Gevey SIM user, must know that updating iPhone 4 to stock iOS 5.1 will kill Gevey SIM functionality. Don’t worry, heres how to get out of it!
Before you get started with you have to first preserve the older basebands [How-To Tutorial]
Important Note: While the Gevey SIM will be only able to unlock iPhone 4 on basebands 4.10.01 – 3.10.01 – 2.10.04 – 1.59.00. Now we will be perfoming how to update your iPhone 5 to iOS 5.1 preserving the unlockable basebands. Using Redsn0w we will cook custom firmware which will be used with iTunes to restore your iP4 to 5.1.
You require all these:
How To Unlock iPhone 4 on iOS 5.1 Using Gevey SIM
Step 1 : Connect your iPhone 4 to your Windows or Mac computer via USB and launch Redsn0w.
Step 2 : Now press “Extras” > “Custom IPSW” and then point Redsn0w to iOS 5.1 ipsw firmware that you already donloaded before.
Redsn0w will now started cooking your custom iOS 5.1 firmware.
Step 3 : Now click on “Pwned DFU”
Step 4 : Now make sure your device is both OFF and PLUGGED IN to the computer before you click “Next”.
Follow the instructions provided to put your iDevice into DFU mode:
Step 5 : Now open iTunes, then Restore your iPhone 4 to custom 5.1 ipsw ( the file name begins with NO_BB)
If you have followed the steps correctly, you will be updated your iPhone 4 to iOS 5.1 with preserving old basebands. Now you have to follow the simple guide to unlock iPhone 4 with Gevey SIM with the video tutorial.