Jailbreak iPhone 3G is very risky, because if there is a failure might be your equipment can be damaged or die. Here is a quick way to jailbreak your iPhone. This paper is only as an introduction only, the following ways, according to its author intended as a source of knowledge.
For the record: You do not need jailblreak your iphone, to be able to add and install new applications or various other interesting programs for your iPhone. You can install programs or applications through the apps store. All you need is an iTunes account to be able to start the download and install applications from the apps store.
The following Tuorial specifically for iPhone 2.xx 3G iPhone Baseband version of 2:28 or less (I know in the baseband version of the iPhone is: on [Home Screen] click [Settings] - [General] - [About] - and see [Modem Firmware] ).
Jailbreak the following steps using the QuickPwn software.
1. Prior to Jailbreak iPhone, download the files needed to process the following Jailbreak.
* QuickPwn-225-2.zip (16 MB) Through http://foskarulla.com/QuickPwn-225-2.zip
* IPhone1, 2_2.2_5G77_Restore.ipsw (http://appldnld.apple.com.edgesuite.net/content.info.apple.com/iPhone/061-5778.20081120.Aqw4R/iPhone1, 2_2.2_5G77_Restore.ipsw) or iPhone1, 2_2.2.1_5H11_Restore.ipsw (http://appldnld.apple.com.edgesuite.net/content.info.apple.com/iPhone/061-5828.20090127.aQLi8/iPhone1, 2_2.2.1_5H11_Restore.ipsw) (non Unlock) (246 MB)
2. Extract and save all files in the folder Pwnage
Connect iPhone to your computer and run iTunes. Make sure your iPhone has been detected by iTunes. then do a restore process. Press the Shift key and click Restore.
3. Navigate to the Pwnage folder as it has been created earlier and open the file iPhone1, 2_2.2_5G77_Restore.ipsw.
Wait until the restore process is complete. After the firmware update process is complete. Under these conditions the iPhone is still connected to the computer, run the program to start the process QuickPwn.exe Jailbreak your iPhone.
4. Once your iPhone is detected by the QuickPwn click the blue button.
Browse or search for the firmware file that you'd use the restore process (iPhone1, 2_2.2_5G77_Restore.ipsw), contained in the folder "Once QuickPwn Pwnage." Valid or not finished checking the firmware file, click the blue button.
Once detected by the QuickPwn your iPhone, click the blue button.
Browse or search for the firmware file that you'd use the restore process (iPhone1, 2_2.2_5G77_Restore.ipsw) contained in the Pwnage folder Once QuickPwn Done Invalid check whether the firmware file click the blue button.
Make sure your iPhone is connected to the computer, before starting the jailbreak process. If you have been convinced click the blue button.
5. Furthermore, your stay please follow the steps as instructed by the QuickPwn carefully, and certainly without fault if you do not want to fail in the Jailbreak process.