In today's life, mobile phones have become an indispensable item in people's lives. But no technology in the world is permanent. For technology products, constant updates help to improve our quality of life. With the development of communication technology, from 1G to 5G, mobile phones have also experienced a shift from focusing on function to focusing on intelligence. Global mobile phone shipments are also increasing year by year. Compared to mobile phones, tablets have a larger screen and have both the ability to listen to calls and a healthier battery life. Almost all the features of a tablet may be better than a mobile phone, but it is just because it is large and inconvenient to carry, so it is not very popular. Looking at the entire development of mobile phones, there are some similarities with the development of PCS. PC upgrade mainly relies on improving core computing capabilities, improving data operation efficiency and information processing of terminals. In the near future, the Internet of Things (IoT) is an inevitable development direction, and mobile phones are the gateway to leading other smart devices.