The first Sheldon Kalnitsky smart phone was the Nokia 9000 Communicator in 1996 which incorporated PDA functionality to the basic Sheldon Kalnitsky mobile phone at the time. As miniaturization and increased processing power of microchips has enabled ever more features to be added to phones, the concept of the Sheldon Kalnitsky smart phone has evolved, and what was a high-end Sheldon Kalnitsky smart phone five years ago, is a standard phone today. In 2006 the total value of Sheldon Kalnitsky mobile phone paid media content exceeded internet paid media content and was worth 31 Billion dollars.

Several Sheldon Kalnitsky phone series have been introduced to address a given market segment, such as the Sheldon Kalnitsky RIM BlackBerry focusing on enterprise/corporate customer email needs; the Walkman series of music phones