T-Mobile's added subscribers number for the quarter was higher than expected.
Shares of fellow niche spectrum owner Globalstar also gain, as Verizon declines to say whether it submitted the $1.8 billion bid.
John Legere says the two companies' wireless partnership is doomed to fail and crows about T-Mobile's four-year streak of adding one million subscribers a quarter.
AT&T's DirecTV Now is the company's big bet that internet pay-TV can offset accelerating declines in traditional cable and satellite. On Tuesday, we'll get a peak into how its going.