T-Mobile US Inc said on Wednesday it added 1 million net new monthly bill paying phone subscribers in the fourth quarter. The company’s shares were up about 1.5 % at $68.79 in trading before the bell.

In December, T Mobile won backing from two national security reviews for its deal to buy smaller rival Sprint Corp as it strives for more scale to compete with Verizon Communications Inc and AT&T Inc.

The report on subscriber numbers comes a day after Verizonbeat Wall Street estimates for net new phone subscribers who pay a monthly bill, adding 650,000 customers in the fourth quarter.

In the quarter ended September 30, T-Mobile exceeded analysts’ estimates for net new phone subscribers and profit, driven by its competitive wireless plans and trade-in offers for iPhones aimed at fending off its bigger rivals.