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T-Mobile US is continuing its steady growth, announcing this morning that it added 2.1 million net customers in the second quarter, its ninth consecutive quarter with more than 1 million net additions. The additions bring T-Mobile’s total customer count to 58.9 million overall.

The additions could position T-Mobile as the undisputed No. 3 in the U.S. wireless market. Sprint reported 57.1 million customers as of the end of March, and but has not yet announced its customer count for the June quarter.

T-Mobile said its additions included more than 1 million postpaid customers. Analysts and investors look at postpaid growth as a key way to determine a carrier’s health. These customers, who pay at the end of a billing period, typically have better credit than their prepaid peers and are considered more valuable.

The company has not yet announced its full earnings for the quarter, but it released this chart showing its customer trends.

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Bellevue, Wash.-based T-Mobile also introduced a new program this morning called “Mobile Without Borders,” letting its customers make calls to Canada and Mexico from the U.S. or when traveling across North America without extra charge, as part of the company’s Simple Choice wireless plans. The initiative also covers texting and data for T-Mobile customers across North America, with access to LTE speeds.

“Even if Donald Trump wants to put up a wall up to block everyone from coming in, the phone coverage is going to work seamlessly,” said T-Mobile CEO John Legere on a conference call with reporters and analysts this morning. Legere had a public fight with Trump on Twitter prior to the real estate mogul announcing his latest presidential ambitions.

The program launches next Wednesday, July 15. Legere said T-Mobile has partnered with the No. 1 and No. 2 carriers in Canada and Mexico to provide wireless service to T-Mobile customers when making calls in those countries. He mentioned Telefonica, Telcel, Bell and Rogers.

It’s the latest in a series of moves that the company is calling “Un-Carrier Amped,” revisiting and upgrading the Un-Carrier announcements that have fueled much of the company’s growth over the past two years.

Here’s Legere introducing the plan in a video update this morning.

AT&T earlier this year announced unlimited calling to Mexico, but Legere noted that T-Mobile is one-upping its larger rival by covering the entire continent.

The company previously rolled out free international data roaming for travelers in more than 100 countries, with access to lower-speed networks.

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