Originally Posted by
fishingmaniac
My iPhone 3G did not get a fix even when held up against the window for 30 sec. My guess is that maybe the algorithm couldn't do the math calculations fast enough to keep up with the high rate of travel, or the multiple layered window and frame obstructed the view too much.
Many phones have a tiny antenna that is not that effective. On the ground they rely on assisted GPS but in the air it has to work only on true GPS.