What do you think is the greatest pleasure that mobile phones bring you?

I can kill boring time. I am also a person who likes playing games very much. I've played the glory of the king's King's Fight, eaten chicken, played mobile games, and I've been angry with these games. However, at least he makes you happy in your spare time. Also, because I am a student, I often have to take the train. Nothing is better than downloading a lot of movies on your mobile phone to kill time. Now the configuration of smart phones is getting better and better, and the camera function of mobile phones is becoming more and more powerful. So you can take photos when you have beautiful scenery, when you are at a party, and when you are bored, you can take selfies and add a beautiful picture. Although I am not a narcissist, I will take a selfie once or twice, and I can also record videos to commemorate many happy moments.