@Branka-and-Silvia0-
While you list some good suggestions,
1. Airbnb app- We use two phones to try to insure we do not miss bookings. One is a dumb phone, the other is a smart phone with the Airbnb app. Neither phone receives the notification when Airbnb SMS notifications fail.
2. When I was a new host I had email notifications set up through Gmail. However, Airbnb sends numerous emails in the middle of the night for our time zone. We would NEVER get a full night's sleep. As a matter of fact, your reply to this thread would have woke me up at 2:41 AM.
The point is that numerous hosts are having this problem. Missed notifications occur with iphones, androids, smartphones, dumbphones and even the Airbnb app.
With that said, I do appreciate the time you took to answer because new hosts might not know about all of the ways to receive notifications and that information is very helpful.