When was the second i Phone invented?

The second I - Phone that was invented was in 2008. It's the same thing as all the other I - Phones but it has less apps and other stuff. Some don't have a camera etheir. Now they do. So if you have an I - Phone or want an I - Phone I think you should get the newer ones because if your also going to use it for school and playing games then you should get the new ones but by the way if you play games on it then your battery will run out fast. If you get a samsang that is new and touch screen you can get a camera games and music just like the I - Phone but better.