Before the 21st century came, Writing letters or calling the telephone had been the only effective methods that could be used for communication. In the epoch of rapid development of science and technology, a vast number of mobile devices, such as smartphones, smartwatches, laptops, and tablets, have played an imperative role in human conservation. This is because these handheld devices can allow individuals to chat with someone according to their will. The essay will list some cons and pros about the social phenomenon, and do a comparison between both.