The company brought in earnings of $1.75 per share, up from a 12-cent loss per share in the same quarter of 2016. Analysts had expected the stock to lose 4 cents per share, according to Investors Business Daily.
Sprint said it would receive a roughly $7.1 billion "favorable impact from tax reform" — a significant boost in income for the quarter.
The company added 184,000 postpaid phone subscribers. That's still less than its main three competitors.