 Smartphones were the second hardware platform after Pocket PC to run Windows Mobile , and debuted with the release of Pocket PC 2002 . Although in the broad sense of the term " Smartphone " , both Pocket PC phones and Microsoft branded Smartphones each fit into this category , it should be noted that Microsoft 's use of the term " Smartphone " includes only more specific hardware devices that differ from Pocket PC phones . Such Smartphones were originally designed without touchscreens , intended to be operated more efficiently with only one hand , and typically had lower display resolution than Pocket PCs . Microsoft 's focus for the Smartphone platform was to create a device that functioned well as a phone and data device in a more integrated manner . 
