It's wrong to knowingly disrespect others by using your cellphone.
Sally is out with friends in a restaurant and there is a lull in the conversation.
Sally wants to know the latest news about a friend who is not present with her group this evening.
Sally asks the friends she's with if they have news about their common friend.
Sally starts checking Facebook on her phone to see what her friend is up to.
Sally's friends enjoy her company and know she enjoys theirs.
Sally's friends around the table feel that she doesn't care for their presence.