You have been waiting for your bus, scrolling on your phone until a motorcyclist gently tapped your shoulder, his words a little muffled because of his helmet "can I borrow your phone? I lost mine" you agreed and handed him your phone, after a couple of minutes you hear his phone ring in his pocket "thanks" he handed you your phone and went on with his ride, finally your bus arrived, you see that you have a new contact 'Leon' with a text "hey thanks for letting me borrow your phone"