Originally Posted by
GlueBall
It's conceivable that out of 200+ mobile and smartphones with identifiable GPS receivers some didn't get turned OFF, or weren't switched into FLIGHT mode. Assuredly, those recorded GPS satellite signals could be traced from the airplane's last known position.
Um..A GPS receiver is just that, it only receives radio frequencies. There is no way to determine if a GPS receiver is active (its like detecting your TV or car radio is receiving a channel)
Mobile phones however transmit & receive.