Dear Queenie,
Please settle an argument I have with my parents:
Is it rude to use your cell phone when you are together with someone?—Cell phone Etty Ket
Dear Etty Ket,
When you are together with someone it is rude to make or accept calls to or from someone else.
However, using your cell phone as part of the conversation with the person(s) you are with is okay, like showing them pictures or checking on something that is part of your conversation with them.
