6. Samsung Epic 4G
Released in August 2010, the Epic 4G had a slide-out keyboard that mandated that the home screen be rotated into landscape mode. As a result, the device shipped with a heavily modified version of Samsung's TouchWiz 2.5 interface, instead of the more advanced TouchWiz 3.0. The device shipped with Android 2.1 Eclair, later upgraded to 2.2 Froyo. The Epic 4G had a 4-inch display and shipped, a 16 GB memory card amd a 1 GHz Samsung Hummingbird application processor.