Dating and phone etiquette
Whenever your phone beckons, answer it quickly, make it brief.
If no one is talking to you, make an effort to talk to someone. Only answer the phone that is not yours if you have been instructed to do so.It is more acceptable to place your cell phone on the table, though traditionally cellular phone etiquette is not to do so. Answer in a manner that identifies yourself since the caller is not expecting you.If you really really have to talk at the table, do so quietly. This is in consideration that you will not be a disturbance to other people at the restaurant.Do not text or use your phone when you are driving if you can help it.
It is quite rude to "keep watch on your cell phone" especially when you are in the company of others.
The less formal the restaurant, the more casual you can be with your cell phone.