When you leave a phone at home or when the phone is not working. Incoming calls are transferred to another phone when the phone is turned off. Android phones have four forwarding modes: Always forward, when busy, when unanswered, and when unreachable.
If you enter a phone number in Always forward, all incoming calls will be forwarded to the other phone without incoming calls. When busy, it will transfer the phone to the other side when the phone is not working. When unanswered, I will transfer the next one before I go when I do not pick up the phone. You do not miss the call.