How to Unlock and Jailbreak iPhone 3GS? Step-byStep Guide

Posted by HamzaZafar | Tuesday, July 07, 2009 | | 0 comments »

Here's a video from iPhone Dev Team blog, which demonstrates how to Unlock your iPhone 3GS in few easy steps!

Here’s a brief video demonstration by @planetbeing of the iPhone Dev Team’s ultrasn0w unlock for the new iPhone 3G S. Special thanks to @Oranav for the at+xlog crash — a gift to the community that has kept on giving!

Our ultrasn0w program uses the at+xlog crash as an injection vector of our unlocking payload — and it does so on the 3GS in exactly the same way as on the 3G! But this injection vector will be lost if you update to 3.1 using the official Apple IPSW, which updates the baseband. So stay away from official 3.1 IPSWs until we release the tools that let you update the firmware without updating the baseband.

iPhone 3GS Unlock Demonstration from planetbeing on Vimeo.

If you encounter some confusion in this video, or are looking forward for a step-by-step guide to Unlock your iPhone 3GS, then here it is in few simple steps:

1. Download Redsn0w first.

2. Download the original firmware of your iPhone from here and here. These two files are a splited version of a single iPhone firmware, and therefore you need to extract it using WinRAR first to get a single firmware file out of it.

3. Connect your iPhone to the USB port and execute Redsn0w. It should detect your iPhone and something like this would be displayed:

4. It would either automatically detect your firmware, or you'll have to browse to the file you just downloaded.

5. It would ask about the packages you want to install, check on Cydia and Unlock.

6. Keep following the on screen instructions, it will ask you to reboot your iPhone

7. After rebooting, you'll have a jailbroken iPhone, but you won't be picking up any signal. Now its the time to unlock it.

8. Browse your iPhone to the Cydia application and execute it. Its an essential application that is installed automatically after the iPhone is jailbroken.

9. Download from there. Your iPhone should be connected to a WiFi.

10. Download Ultrasn0w from Cydia. Search it and you'll find it easily.

11. Restart your iPhone 3GS and now you are free to choose the carrier of your choise!

Geek Engineer


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