Abstract
The era of mobile communication has arrived because the maturity of 3G environment and the popularity of smart phones. Today, over one billion users put most of their time in using mobile devices and the Apps services. The network evolution, starting from the Internet search engines such as Yahoo and Google in 1993, then social network website such as the 2004 Facebook, now coming to the age of Mobile Internet and Mobile Apps age, such as the top 3 of Instant Message Apps, LINE, WeChat and Whatsapp. These Instant Message Apps influence us on many aspects of life, offering people 24 hours service no matter where you are and when you need them. This kind of 24 hours service creates lots of business opportunities, combined, including communications media, entertainment, logistics, education, health and so on. So Instant Message App becomes a new social networking platform now. Free instant messaging software makes operators worldwide lost $ 23 billion of SMS (SMS) revenues last year. Operators said, "free instant messaging software is a killing SMS business from operator worldwide" In addition, IM App start to make money and come out their new business model in 2012. These IM Apps come out their profitable business model quicker than Google and Facebook before. This thesis explores the business models which offer free service to users but make incredible money from them.