I am writing to you about your article in last Sunday’s newspaper, “Cell Phones make Life Easier.’’ You did an excellent job explaining the good points of cell Phones: they’re convenient, we feel safer always being able to call someone, and they are very helpful in business. On the other hand, you didn’t talk about their bad points at all. I hope you’ll let me give your readers some advice on cell phone etiquette. The first point I’d like to address is when not to use your phone