Top 10 in Top 12 Code of Conduct on Vietnamese dining tables.
Everyone who knows the use of a phone at the dining table is behaviour that is not polite. You should focus on your meal and the same people you eat with you. Also, you shouldn't leave unnecessary items on the dining table to avoid disturbing others, such as a handbag or roughly papers....
The use of the phone while eating will cause people around discomfort, they are dominated by the phone. Not to mention that you have heard the phone or use the phone will affect your stomach, health.