IPhone 3GS
This iPhone is named "3GS". The "S" in "iPhone 3GS" means "Speed". The iPhone 3GS has better performance, allowing it to run faster and more efficiently. It also has a higher quality camera that can take photos with higher resolution, as well as take videos with better quality. It also adds the ability to use voice control, a function where users can talk into the phone to command actions on the phone.  The iPhone 3GS can also support faster downloading.