Telecommunications giant AT&T said Thursday that it has invested more than $550 million in its Austin network over the past three years.

The projects have helped improved service for customers using both wired and wireless services, the Dallas-based company said.

AT&T said upgrades included construction of additional cell towers, increased coverage and capacity for mobile broadband and WiFi services via new distributed antenna systems, and enhancements designed to boost service near the University of Texas campus and at local sports venues.

"We're committed to providing our Austin customers fast, reliable, highly secure connectivity,” Leslie Ward, AT&T’s vice president of legislative affairs, said in a written statement. “We want them to access the Internet at any moment, from almost any device and from anywhere. Our continued investment in Austin brings a host of new, innovative opportunities for residents and businesses."

Work will continue in 2016 and beyond, AT&T said, with a particular focus on making super-fast, 1-gigabit Internet available to more residential and business customers.

"Austin has a strong, vibrant economy and is a recognized leader in tech," said state Sen. Kirk Watson, whose district covers parts of Austin. "Strong investment in our communications infrastructure is key to our continued growth in all areas. I appreciate AT&T's commitment to this community as they continue to invest in a fast, reliable network to ensure our businesses and residents have access to the tools and technologies needed in today's fast-paced world and economy."