What do you need a phone number for staying in an express hotel?

It is convenient for the hotel to contact hotel guests.

For example, if the guest is not in the room when checking out, the hotel must contact the guest to renew the room or check out, otherwise the hotel will sell the room and the guest will come again. What should I do?

Or the hotel will contact the guests if they find something left behind after they leave the hotel.

Wait, that's it anyway. The advantages outweigh the disadvantages.