I have an iPhone. I registered for Pandora in Boston, yet when I visit New York City Pandora continues to send me Boston ads. It seems likely they send an approximate zipcode you register with - not your actual location.
Likewise. I used the flash player in state A, then moved to state B and bought an iPhone, but I continually get adds related to state A on my phone. Never got a single add when I actually lived in state A, though.