Android 3.x was "the tablet OS" which was not very suitable for phones. The problem was, Android tablets back then (Motorola Xoom et al) did not exactly set the

Android 3.x was "the tablet OS" which was not very suitable for phones. The problem was, Android tablets back then (Motorola Xoom et al) did not exactly set the world on fire. Almost all the phones skipped 3.x completely and moved from 2.3 to 4.x.