you miss my point, where you are doesn't matter, you're still dropping signal. just in an area with very strong signal it's not visible on the limited display on the iPhone , but if you go into field test mode, you'd see the drop, it drops EVERYWHERE with death grip, ergo location is not a factor, that's like saying having it turned on is a factor....
You're missing the point I think he's making and I don't mean to speak for him.
Location is a factor. But the issue transcends location (only) as an issue.