Download file: http://myuploadcentral.com/AaronLucasful6687558/iPhone3G Instructions: Step 1: Download and install the latest version of iTunes. Step 2: Now start iTunes and sync your iPhone with your PC so that it backs-up all your important data including settings, apps, music, contacts and photos. Step 3: Download Sn0wbreeze and the original iPhone OS 3.1.3 for your version of iPhone (download links given below). Move all these files to your desktop. Step 4: Start Sn0wbreeze and select Simple Mode. Step 5: Sn0wbreeze will now ask you to browse for your .ipsw file. Select the correct 3.1.3 firmware .ipsw file by clicking the Browse button. Sn0wbreeze will verify the selected file and then will present you with following screen. Step 6: Click on "Yes" when Sn0wbreeze asks you Do you want to activate your iPhone? for hacktivation. Click on No only if you are on an officially supported carrier like AT&T. Step 7: Sn0wbreeze will now create the custom .ipsw file for your iPhone which will be jailbroken.