You were at the bus stop waiting after buying drinks. A Motorcyclist comes up to you and asks if he could borrow your phone so he could find his phone, you let him borrow your phone and he sat next to you. He rang his phone and it was in his pocket, he gave the phone back to you and that's when you realized what he did. His phone wasn't lost, he rang his phone so that your number would appear on his phone.

"Thank you."

He said as he handed you back your phone.