
First, AT&T will pay a $3 billion breakup fee (the largest ever), which it will pay in the next week. Additionally, the company must agree to "a large package of mobile communications spectrum and a long-term agreement on UMTS roaming within the U.S. for T-Mobile USA, all of which is worth about $1 billion," says Cnet.
T-Mobile will get new spectrum in 128 markets, including most of the major markets including Los Angeles, Dallas, Houston, Atlanta, Washington, D.C., Boston, San Francisco, Phoenix, San Diego, Denver, Baltimore and Seattle.
On the roaming end, T-Mobile will get to roam on the AT&T network for the next 7 years.