The phone could use a transmitter with circular geometry - a wire loop, for instance. It could be part of the case; I assume the magnetic field is unaffected by

The phone could use a transmitter with circular geometry - a wire loop, for instance. It could be part of the case; I assume the magnetic field is unaffected by human touch, unlike the iPhone 4's antenna infamously did: http://www.wired.com/2010/06/iphone-4-loses-reception-when-antenna-band-is-touched-firmware-issue/ http://www.wired.com/2010/06/iphone-4-loses-reception-when-a...