Using phone while talking to someone is extremely rude.

When I was talking with my friend last week, I was very happy because she never touched her smartphone while we are talking at a cafe. Nowadays, it is very difficult to find a person who focuses on the conversation without looking at a smartphone, and finding one of my friends is this type of rare person, and we were talking about this topic for quite a while, so I decided to write a blog post about it. Why using a phone while talking to someone is extremely rude.