How do I know if the phone is transferring calls?

If it is this phone, you can look at the corner arrow in the upper right corner of the phone screen, indicating that the phone has been paged. If you want to know whether someone else's mobile phone is paging, you can first open the SMS of your mobile phone to report it. If you call the other party to remind you to turn off your phone, then if the information report in the clockwork SMS reaches * * * *, it means that the other party has turned on the phone for paging.