A method for establishing for a first smartphone a phone connection with a second smartphone, each smartphone comprising a phone and running a software application (“app”), the method comprising: exchanging, by operating the app, at least one permission message between the first and second smartphones; transmitting a first identifier from the first smartphone and a second identifier from the second smartphone to a call connector, responsive to a successful exchanging of the at least one permission message; and connecting a first phone call and a second phone call to establish a phone connection between the first and second smartphones, if the first phone call matches the first identifier and the second phone call matches the second identifier.