ASUS - ZenTalk

When I am on a call on Sim 2 people calling me on Sim 1 go straight to VM. I went to call settings - carrier related - additional settings to make sure Call Waiting was on and it was.Any ideas?

When I wake phone up all my messages get delivered at once. Also I do not get Whatsapp calls while phone is sleeping. I checked in the app permissions.Is there some kind of data saver or battery saver on that is causing this?

Asus Zenfone 8Build 31.1010.0410.72People calling saying it is going to VM frequently. Sometimes I get the call sometimes I do not. When I turn on and off airplane mode I see the network text message appear showing I missed calls and have VMs. Happen...