Each successive generation of the iPhone has added new features and, in almost all cases, gotten better. From the original iPhone (which looks kind of old and pokey now, but was a pretty big step forward in terms of ease of use and multitouch) through to the iPhone 4s, each step in iPhone history has introduced big changes to the iPhone line up.

We compare the hardware specifications of each generation of the iPhone so you can get an easy sense of how things have changed through iPhone history.