Under what circumstances do you prefer to use SMS compared with WeChat?

Nowadays, social software generally uses WeChat or QQ, or email, and rarely uses SMS. However, sometimes SMS is irreplaceable by other social software. Compared with WeChat, I usually prefer to use SMS in three situations.

First of all, when I want to talk about some serious topics, I will use SMS. The most typical example is when the class teacher and I take time off and explain the reasons for taking time off. Because asking for leave is a serious matter, you can't talk to the class teacher on WeChat, which would be a bit informal. And generally speaking, I won't add the teacher's WeChat, just write down the phone number at most. Sometimes I will call the class teacher to ask for leave and explain the reason, but sometimes I am not sure about the time. Maybe the teacher was sleeping or eating at that time, so it might not be good to call him directly. In this case, I will definitely use SMS, because when I send a SMS, the class teacher will check my mobile phone when he is free, so that he can see my information, which is more convenient.

Secondly, when I take the train or the high-speed train, I prefer to use SMS. Wechat can only be used if there is a network. But when I take the train or the high-speed train, I often pass through some tunnels or lots. There will be no network signal on the mobile phone, but the signal will always be there. At this time, it is obviously more sensible to use SMS instead of WeChat!

Third, when you don't want to chat with each other for a long time. For some people, sometimes I just want to settle the business with him, and I don't intend to talk about anything else in depth. Because I think if I chat with him on WeChat, I will continue to chat with him after the matter is solved. This is a very uncomfortable thing. So whenever this happens, I prefer to use SMS, which means to tell each other: OK, that's it, goodbye.