Fifth, period 3G (3rd Generation). Mobile phones have a developed to Smartphones. Smartphones have a mufti-function equal to computer. Users can use multimedia more efficient, data transfer application, including improved voice service and speed internet download system on phone such as transfer large file service, video/call conference and download video or music via on Wi-Fi. In addition, Smartphone has a touch screen and high efficiency. Users can play social network, application and high quality game on Smartphones. In period 3G, Smartphone has a system to choose from two choices (iOS and Android).