Two years before the iPhone's debut, Apple and Motorola teamed up to launch the world's first mobile phone to integrate an iTunes music player. Featuring a candy bar design (popular at the time) and a 176- by 220-pixel display, the Rokr E1 suffered several shortcomings that made it unappealing to iTunes aficionados. For instance, it could load only 100 songs at a time, and it lacked wireless transfer or high-speed USB, according to Wikipedia. The next version of the Rokr, the E2, ditched iTunes for RealPlayer, and also supported more music formats. The Rokr line played on for a few years but never quite found its pitch, particularly after Apple released the iPhone in 2007.