AT&T stops injecting tracking headers (for now), Verizon still is. http://www.propublica.org/article/att-stops-using-undeletable-phone-tracking-ids?utm_medium=App.net&utm

AT&T stops injecting tracking headers (for now), Verizon still is. http://www.propublica.org/article/att-stops-using-undeletable-phone-tracking-ids?utmmedium=App.net&utmsource=PourOver