I recently bought my new Huawei Mate 20 Pro after upgrading from Mate 10.
On this Mate 20 Pro sometimes while the phone is in idle mode, the startup tone starts playing without having any incoming call or an application running in the background. I tried to switch it off from the side button for muting but no respond.
The only way to switch off this annoying sound is only by switching off complete. This is very frustrating bug and would like your opinions / ideas of how to resolve it.