Following its merger with Sprint and a strong second quarter, T-Mobile has passed AT&T to become the nation’s second-largest wireless carrier.

T-Mobile closed its merger with Sprint on April 1 and has been chalking up one milestone after another. It’s worked hard to integrate Sprint’s spectrum into its own network, rolled out mid-band 5G in major cities and unveiled the world’s first nationwide standalone 5G network.

With its second quarter report, T-Mobile has added some 1,245,000 total net additions, including 1,112,000 postpaid net additions. This represents the 22nd consecutive quarter where T-Mobile has led the industry in net custom additions.

Even more impressive, T-Mobile has managed to overtake AT&T as the second-largest wireless carrier in the US.

“Surpassing AT&T to become #2 was a huge milestone to kick off Q2, but that was only the beginning! In our first quarter as a combined company, T-Mobile led the industry in total branded customer adds – even in a challenging environment – and there is no doubt that we are THE leading growth company in wireless,” said Mike Sievert, T-Mobile CEO. “Now we’re setting our sights on #1 – in customer choice and customers’ hearts – and we’ll get there by doing ONLY what the Un-carrier can do: offering customers the most advanced 5G network AND the best value while continuing to make big moves that fix customer pain points and disrupt this industry. I’m excited about what’s to come in this new T-Mobile era – we’re just getting started!”

This is a major milestone for a company that, just a few years ago, was the fourth largest carrier in the US.