An emotional Jerry Jones, the team's owner and general manager, said Thursday he wants "this building to be more familiar than the White House."
The name change for the $1.2 billion Cowboys Stadium takes effect immediately. Numerous signs outside and inside the stadium will be changed to reflect the AT&T name. The company is based in nearby Dallas.
Team officials declined to reveal terms of the deal, including cost and how many years are included.
The team says the deal includes access to AT&T mobile technology. The arrangement will double the stadium's wi-fi network for faster mobile access and expand the options provided by the Cowboys' mobile app.