BEEP! Hi, Nick's phone. Nick doesn't have AT&T, and therefore has no bars in some crucial location he ended up in. So he won't get your call with the crucial information that you could have given him in person a week ago, so it looks like we'll undergo some horrible consequence, such as death or imprisonment, as a result of missing your call. But it's because we don't have AT&T, and not because cell phones have fooled us into thinking we don't have to prepare for anything. And also, land lines and emails don't exist, and people don't post security outside demolition sites.
BEEP! Hi, Wynn Guy's phone. Wynn Guy doesn't have AT&T, so he's not getting your phone call about how the crumbling economy won't support his existing luxury Vegas hotel, so he should find a better way to follow it up than by building an identical hotel two blocks away, and then filming an ad on its roof.