The Mexican billionaire may be interested in making a play for the rising mobile phone carrier.
After large gains over the last couple of years, and questions surrounding profit margins and an offer from Sprint, T-Mobile appears a risky investment at these levels.
The phone giants -- with an assist from the FCC -- have charged for roaming in a way that makes it hard for other companies to lower prices.
Apple put up a major iPhone blowout last quarter. The Mac maker can potentially do it again. Here's how.
Increased usage of mobile data and applications is leading carriers to invest in their networks, driving demand for tower space.
FOMC meeting minutes send the S&P 500 higher as AeroVironment, America Movil, and Arrowhead Research all soar.
T-Mobile US stands accused of hiding unauthorized charges, but will the FTC claim hurt the company's long-term business?
Charges by the Federal Trade Commission allege the carrier has benefited from a practice known as cramming.
American Tower is the best-positioned tower operator, with better margins, debt management, and international exposure than its competitors.
American Tower is a stable, lower-risk investment because of its long-term, guaranteed contracts.