The hotel key card won't open the door. Is it useful to change it?

Useful. All hotels are smart locks, and you must use a room card to open the door. If the room card is left in the room and the main card is not available, you can apply to the front desk for a new card. If the hotel key card can't open the door, it will be useful to change it. Basic definition of access card In order to perceive the existence of the card and guide the information in the card to the host computer, the host computer first considers the illegality of checking the card, and then decides whether to close the door.