Sprint Cell-Tower Giveaway Put Pressure on AT&T, Veriz

Sprint Cell-Tower Giveaway Put Pressure on AT&T, Veriz

Rick Maiman/Bloomberg

Sprint, the third-largest U.S. mobile-phone carrier, and larger rivals AT&T and Verizon Wireless are seeking ways to add capacity as customers increasingly use mobile phones to surf the Web and watch video clips, boosting network traffic.