Jailbreaking 3GS Phones: A Step by Step Tutorial
A few people are under the mistaken belief that to jailbreak 3GS phones is impossible, but this is not true. What I'm about to lay out for you is a simple step by step how-to manual to crack and jailbreak these kinds of mobile devices. After you get your hands on the requisite software utilities you can often get this done in an estimated half an hour.
1. Before you unlock the Apple phone you will need to jailbreak it and to do this you will need the Apple IPSW - not some fake version. Plug in the iPhone and then hit "restore". It will ask if you agree to do a back-up of the phone and then the app will begin to download. When the download pops up on the right quadrant of the screen, unplug the phone from the wall and the PC. You don't in reality need to let the restore complete; you simply need to get the IPSW file.
2. So you've downloaded the file - now open redsn0w and click on "browse". In the case that you are downloading thru Apple iTunes, select the iPhone2, 1_3.0 7A1 file - it will be in the library under the folder for iPhone Software Updates; in sub-account that says user.
3. Hit Ok. Then pick the button that says "next", you ought to get to where the kernel is in order to start compiling the customized firmware that is used to crack the mobile device. After completion of the loading procedure you'll be queried as to which options you want to load. Click the check box on the Icy and Cydia boxes and click "next" to permit redsn0w to finish putting together the firmware.
4. After the app is loaded, redsn0w will put your mobile unit into DFU mode. Be cognizant that 3GS phones are not all the same when it comes to DFU mode vis a vis older models of phones. Carefully follow the instructions - disconnect, power off and plug in the unit when it tells you to. Depress the home button until the logo reappears. The app will then begin the jailbreak.
5. Next up, you'll need to load "Icy". You might have to wait for the sources to compile. After it does so, then you should tap the edit key at the upper left corner . After this, click the button labelled "add" to type in: http://repo666.ultrasn0w.com inside of the source location. Pick the more sizeable add key to wrap up the source add-on.
6. Whilst you have the Icy app open, you should scroll toward the bottom of the screen and select the key that says "Utilities". Be certain that you hit "Utilities", not "Utility". At the bottom of the utilities screen "ultrasn0w" should be seen". Push that and then Push "Install". When the install is finished, your jailbreak 3GS is complete - simply restart the device and you are completely done!
Before you buy any phone cracking software online, make sure you check Josh Jones' excellent free report on the best jailbreak 3gs software, and his tutorial on how to jailbreak 3g iPhones in general