In this Network Speed TV spot, we open on a group of co-workers in a carpool. The message alert on their phones go off simultaneously. One man looks at his AT&T smartphone and sees that he has already received and downloaded the email. While his co-workers wait on the download, he reads the message and laughs aloud. The humor passes and a silence fills the car. Finally, the others receive the message and burst out laughing, just as the AT&T customer had done fifteen seconds earlier. Don't be left behind. AT&T. The nation's fastest mobile broadband network is getting faster with 4G.