When her car broke down on the side of the road, she though she was lucky somebody pulled over to help her. She thanked him the best way she could. Somehow, she's still the lucky one.
Mobile phone antennas are designed to project a signal in a donut shape, perpendicular to the long axis of the antenna. If you are holding your phone in a strange way, such as on its side or upside down, you will hinder the operation of the antenna. [wiki