What are you referring to when you say the iPhone 3? I'm assuming a typo but not sure if you meant the iPhone 4 (on sale for 2 years) or the iPhone 3GS (on sale

What are you referring to when you say the iPhone 3? I'm assuming a typo but not sure if you meant the iPhone 4 (on sale for 2 years) or the iPhone 3GS (on sale for 3 years and oldest version to support iOS 4.3 and up).