The nation’s top carrier got a 4.1% increase in sales last year as it added more wireless customers while expanding a 4G LTE mobile broadband network that is now available to 305 million people, nearly the entire U.S. population. Facing increased competition from its mobile competitors, Verizon engineered a massive $130 billion buyback of Vodafone’s 45% in Verizon Wireless, a deal that closed in February and earned Verizon nearly $2 billion after taxes in this year’s first quarter. The company also bought digital TV technology assets from Intel — something Verizon hopes will help improve aspects of its FiOS video service and allow it to create a platform for broadcasting TV channels on mobile devices.