the function of mobile phones is: 1. convenient to connect people and is very convenient to use. 2. you will know the world without going out, understand the news of various countries and the international situation. 3. payment is more convenient. people do not need to bring cash. just scan alipay and wechat to pay, which is faster and can avoid the trouble caused by excessive cash. 4. people can access the internet more conveniently without having to bring a computer to connect to the network cable. the convenience brought to people's lives is visible and changes people's lifestyle. after that...