Dad wanted a kind of alarm can contact the phone, the kind of card can be asked to ask
No, there can not be, because you can only control your phone, you control the Department of someone else's mobile phone, even the location information, it can not be so accurate, if you will be programming, I'd have a programming idea, you can Use Bluetooth, if both sides are open Bluetooth, then search for Bluetooth equipment can alarm. Hope to adopt!
