Exactly! I have taken two cellphones into the Mt. Baker National Wilderness --- one an iPhone on ATT -- that lost signal in the trailhead parking lot --- the other, an LG Decoy on Verizon --- that still had two bars in the middle of nowhere at the end of the Ptarmigan Ridge trail.
I just realized, if smartphones really are more prone to issues like this, then not having smartphones/iPhones apparently saved me & my family from spending nights in the wild freezing (if not death) on more than one occasion.
Does anyone know why smartphones are more prone to this attenuation than dumbphones? Can't they use the same antennas in smartphones?
(while I appreciate being aware of the issue, I wish Apple could've done so without making the iPhone "lacking")