Problems of cell phones

Nowadays, it is no wonder that people have cell phones, especially in advanced countries. We have cell phones all of the time and when we need to talk about something, we can contact people anytime by using cell phones without meeting directly. Even though cell phones are convenient, during conferences, classes, and tests, they cause some problems. During conferences, when a cell phone rings, it is very rude to the speaker. Because of the ring, everyone might lose concentration and forget what they are talking about. In tests at school, cell phones bother all students who are taking the tests. Particularly when they take a listening test or something like that, they cannot listen and then cannot answer. It is a big problem for an entrance examination. That is why before we take tests, teachers say “turn off the ring tone” every time. We should not forget to turn off our call phones during serious situations.