Telcoms giant AT&T leads the way with more than $180 billion in revenue in 2019. Headquartered in Dallas in the US, the company can trace its roots right back to the inventor of the telephone, Alexander Graham Bell – it started out as the Southwestern Bell Telephone Company, a subsidiary of the Bell Telephone Company.
As of June 2020, AT&T’s 5G network covers 179 million people in 355 markets across the US. The company boasts the fastest and most reliable wireless network in the country and has now also expanded into Mexico.
