Why does the calendar show no hotel check-in?

There is no saving and the phone is not synchronized.

1. Failure to save means that when the mobile phone set the hotel information on the calendar, the hotel was not checked in but was not clicked to save.

2. The phone is not synchronized because the memory of the phone is full. When the calendar is saved, it will be gone after a few days, resulting in the display that you have not checked into the hotel.