talk about an invention changing daily life positively

Smartphone is one of the inventions that make a big change in people's lives. First, smartphones are used for communication, which can quickly make phone calls, send and receive messages anywhere, at any time because it is easy to carry. Second, we can use smartphones for entertainment. Listen to music, watch movies and play games. Besides, we can also use it to take pictures and record videos to keep happy moments. Once it is connected to a wireless network or a phone data network, we can surf the web, find information for study and work, and even use maps to search for places. In short, smartphones are compact, easy to carry and very useful. However, they should use it effectively and intelligently.