Allow unlocking the screen and accessing other apps while in call
This dialog happened years ago, way before PinePhone and Phosh, but I think it still applies as a wishlist item.
At 2am, I got an incoming phone call.
The Other End: Hello, this is The Big Hosting Company, may I speak to Alexander Patrakov?
Me: That's me.
The Other End: We have tried to charge the credit card that your account is set up to use for service renewals, and failed. Could you please advise us what to do?
Me: I am only a system administrator, not the person who pays for this server. Please call Sergey, it's his card.
The Other End: OK, could you please give me Sergey's phone number then?
Me: I don't remember. It's in my address book, but I would need to terminate this call in order to open the address book.
The Other End: What? Every phone can do that without interrupting the call.
Me: This is an old dumb phone, not a smartphone.
The Other End: OK OK, I will call you again in 5 minutes. Cheers.
I honestly don't know if the expectations of The Other End (i.e. that I will be able to check the address book while in the call) are valid on current mobile OSes. If they are valid for other OSes, they should be valid for Phosh.
For this ticket, it is important that it was an incoming call - i.e. that the screen is locked when the call arrives, and there is no way to unlock without terminating the call. Maybe we should consider separately the cases when the PIN code is set up and is not set up (i.e. effectively no screen lock - which is not supported with current Phosh but may be supported in the future).
For outgoing calls, task switching is not a problem.