Unlock iPhone 4 – iPhone 3GS on 5.0.1

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Below are the steps to perform a Jailbreak and Unlock your device. If you need help at anytime, please first consult the FAQ page for questions, we are here to make sure you are successful.

Read First: Unlocking Guide Start Here

Step 1: Required Downloads

We strongly recommend downloading using the browsers Firefox, Chrome or Opera to avoid errors. If using Safari or Internet Explorer read this first and you may have difficulty when later browsing for the iOS ipsw file.

Click the link below or Right click and (“Save Target As…” or “Save Link As…”) to download the ipsw version software for your device. Important: Do not open the file, just save the file. This file will take 5 to 15 minutes to download, as it is 600-700MB in size. WAIT! DO NOT GO TO STEP #2 UNTIL THE FILE IS DOWNLOADED

Download Jailbreak Software for Mac / Windows
Download iOS 5.0.1 ipsw for iPhone 4 / iPhone 3GS
Download iTunes

Step 2:

Connect your iDevice with your PC via USB and open Redns0w you just downloaded above.

Step 3:

Start the Jailbreak Software, press on “Extras” > “Custom IPSW” and then point Redns0w to iOS 5.0.1 ipsw firmware that you downloaded above.

Now Redsn0w will start cooking your custom iOS 5 ipsw firmware

Step 4:

Click on “Pwned DFU”

Step 5:

Now make sure your device is both OFF and PLUGGED IN to the computer before you click “Next”.

At this stage you will be presented with a screen where you will be guided on how to enter DFU mode. Quickly hold “Power” button and then while holding the “Power” button, you will now have to hold “Home” button too. Now after few seconds release “Power” button but keep holding “Home” button until installation begins.
Follow these instructions on the 3 screens below:

Continue holding the home button until iTunes pops up a message telling you that it has detected a device in recovery mode.

After the device has successfully entered DFU mode, your device will be black like this:

Note: It may take a few attempts to get your device into DFU mode. Generally, if you are still holding both buttons down and you see the Apple logo you are holding them down for too long!

Step 6:

Open iTunes then Restore your iPhone 4, 3GS to the Custom iOS 5.0.1 ipsw (the file name begins with NO_BB).

Step 7:

Now Open Cydia > Manage > Sources > Edit > Add then write the following repo :

http://repo666.ultrasn0w.com

Step 8:

After installing this repo, tab on search and search for ultrasnOw then install it.

Congratulation, now you have unlocked iPhone 4, 3GS on 5.0.1