(Tip 13) Leave your mobile phone out
Be cautious to never leave your mobile phone out when having a coffee or meal with friends. It is socially unacceptable to have your phone on the table as if you are waiting for an important phone call. It is perfectly fine to, once in a while, check on your phone for messages but certainly do not use it during meals or drinks. It is considered the height of rudeness. Be present and wait until you are on your own.
