Smart phone refers to the type of mobile phone that, like personal computer, has an independent operating system and independent running space, and users can install programs provided by third-party service providers, such as software, games and navigation, and can realize wireless network access through mobile communication network. At present, the development trend of smart phones is to fully join a number of patented technologies such as artificial intelligence and 5G, making smart phones the most widely used patented products. The birth of smart phone is the evolution of PocketPC. The earliest PDA didn't have the function of cell phone conversation, but with the increasing dependence of users on PDA's personal information processing function, users were not used to carrying mobile phones and PPC at any time, so manufacturers transplanted PDA system to mobile phones, and the concept of smart phones appeared.