Thank you. I will definitely try that out. I don't want to leave Sailfish OS too. In any case, I trust and like it way more than Android and iOS. About the background call, some times when the network is a little weak or busy, the phone takes some time to end a call. So if you dial or redial a number, that action seems to be executed right after the current call ends which will have a delay. If phone app is minimised during this period the cover can be seen showing what it usually shows when a call is in progress.