I had my Samsung A20s stolen in a public transport last year with the same issue of being able to mute the phone even when it's locked. All calls were going through but it was not ringing but as soon as I stepped out of the bus, the phone was turned ...

I had my Samsung A20s stolen in a public transport last year with the same issue of being able to mute the phone even when it's locked. All calls were going through but it was not ringing but as soon as I stepped out of the bus, the phone was turned ...