It is proper Netiquette to check it appropriately. Don’t be a checker.
Checker Netiquette Smartphones
Many people constantly check their smartphones and the applications they enable. They are called checkers. This is distracting to those around you. It messes up the flow.
Go with the flow and check your smartphone when it requires attention or your need to use it for something. Be reasonable.
Check devices reasonably because it causes a distraction.