Where and When Do You Think That Sending or Receiving Calls Should Not Be Allowed?

I think that you are not supported to use your phons on an airplane. When phones ping for signals at 35,000 feet, they can hit hundreds of towers at once. It also might interfere with communication with air traffic control; therefore, you are not allowed use it on the airplane.

Almost people have a cellular phone, but a lot of people are very selfish when they talk on their phones. They don't care about other people's feeling and talk loudly. It's really impolite. When you are on the MRT or in the restaurants, you should keep the voice down. I think there should be a rule that all phones must be turned off in the movie theaters.