So you need to learn how to install Cydia on your iPhone 3G to get that app that all your friends have? It's simple to do and we have created a guide to help you install Cydia on your iPhone 3G. Before we get started we should let you know that in order to put Cydia on your iPhone 3G you are going to need to jailbreak your phone. This will void the warranty on your iPhone. Don't worry it is simple to jailbreak your iPhone and if it fails your phone reverts back to the factory settings. Now that we got that out of the way let's get started.
Download BlackRa1n from the iphone downloads blog. Unplug your iPhone and restart your computer. Once your computer is back on plug your iPhone and launch the program. Then click "make it ra1n."
Wait for your phone to be jailbroken. This can take awhile so grab so grab some grub or turn on the TV. After you have done that you will notice a new icon on your springboard called "blackra1n." Click that icon and you will be given three programs to install. Click the top icon that will install Cydia. Once Cydia is installed you can get every app in the Apple app store for free. You can also get apps that were not approved by Apple such as N64 emulators.
Congratulations you now know how to install Cydai on your iPhone 3G.