In Paris, however, there are stricter rules about how and when to use cell phones. It is not considered polite to use a phone in restaurant, for instance, though it might be acceptable in the more informal setting of a café. One special custom that has developed in cafés seems unique to Paris. Young women often place their cell phones on the table beside them to signal that they are expecting someone. When the friend arrives, the phone is put away. In fact, the French are generally very disapproving of phone use in public and are quick to express that disapproval, even to strangers.