AT&T Inc. (T), valued at $174.8 billion by market cap, is a major American multinational telecommunications and technology services company headquartered in Dallas, Texas. AT&T offers wireless voice and data services, fiber and broadband internet, fixed wireless and managed connectivity solutions, and related equipment, including handsets and network devices, through its Communications segment, and also serves customers in Latin America with wireless services. It ranks among the world’s largest telecom pro ...