Carriers AT&T and Verizon are sitting on some of the most valuable consumer data available so it’s not surprising their creating their own marketing services. AT&T’s offering, called AT&T Alerts will deliver location-based SMS offers while Verizon is leveraging location, demographics and browsing history to deliver personalized deals. Both products require users to opt-in, given the sensitive user data and recent privacy concerns like the Carrier IQ incident.