Guide to Jailbreak iPhone 2g 3G 3GS OS 3.1.2 with Redsn0w 0.9

Redsn0w is an easy to use, multi-platform, multi-device jailbreaking and unlocking tool for the iPhone 2G 3G 3GS and also the iPod touch (first and second generation). Just like Blackra1n, Redsn0w jailbreak  the 3.1.2 firmware already installed on your device, so before you proceed, you must have installed the original 3.1.2. Note that late-model iPhone 3GS and iPod touch 2G whose serial number begins with “MC” are currently restricted to “tethered” rebooting. That means you need to connect your device to a computer to complete the boot after a reset. Also, these devices cannot have custom logos.

Download Redsn0w 0.9 Beta 3

• Windows Version
• Mac Version

Step 1. If you have not already, download the original firmware 3.1.2 on the desktop of your computer. In case of unlocking an iPhone EDGE, to be sure you also download the two files Bootloader: bl39.bin andbl46.bin

Step 2. Connect the iPhone / iPod to PC or Mac

Step 3. Launch the application and click on Browse. Select the original firmware 3.1.2 from the desktop of your computer and then click on Next

Step 4. It will start an automatic process (and very fast) which will be downloaded and patched the kernel.

Following a new screen will appear. Cydia is already selected.

• Install Cydia: Main reason why we jailbreak iPhone.
• Verbose Boot: Will allow you to replace the boot with the apple (boot chart) with the verbose mode, or the ability to see everything that is loaded at startup;
• Custom Boot Logo: Bore with classic apple startup, change with your face or whatever else. Size should be 320X480.
• Recovery Custom Logo: A logo that will replace the classic Recovery;
• Already Pwned: Select if you want to install the verbose boot or change the boot and recovery logos on an iPhone on which has already been to jailbreak;

Step 5. Now you will be asked to put the iPhone in Recovery Mode (iPhone 3GS) or DFU (the other iPhone / iPod).

How to put your iPhone in recovery mode :

1. Turn the device completely off and disconnect it from cable/dock.
2. Hold down the home button.
3. While holding down the home button connect to a computer with a cable (easiest) or dock.
4. Keep holding down the home button until you see a connect-to-iTunes screen You are now in recovery mode.

To escape Recovery Mode and power the phone off simply hold down power and home buttons for ten seconds.

How to put your iPhone in DFU mode :

1. Connect your iPhone to your computer.
2. Turn iPhone off.
3. Hold power and home together for 10 seconds (exactly).
4. Release power but keep holding home until the computers beeps (observed on a PC) as a USB device is recognized.
5. A few seconds later iTunes should detect your iPhone.
6. If the Restore Logo is present on the screen, you are in Recovery Mode, not DFU.

Step 6. Once you are in recovery mode/dfu mode redsn0w will start another automated process to complete the Jailbreak.

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Source: ihackintosh

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