Sprint sold a total of 1.8 million iPhones during Q4 2011, with 40 percent of those going to new customers. Admittedly, 1.8 million is only about a quarter of the 7.6 million iPhones AT&T sold during the same period, and less than half the 4.2 million moved by Verizon, but considering Sprint's 55 million customers ranks as the the third largest U.S. wireless carrier, and this is the first official quarter that Sprint had the iPhone to sell, it still indicates a fairly solid adoption by their subscribe base.

“Our strong fourth quarter performance illustrates the power of matching iconic devices like the iPhone with our simple, unlimited plans and industry-leading customer experience,” said Dan Hesse, Sprint CEO. “During the past year, Sprint added more than 5 million net new customers and grew wireless service revenue by more than 5 percent, including 17 percent for the Sprint platform. This momentum gives us confidence as we execute our Network Vision upgrade and 4G LTE roll-out.”

Although the company recorded a $1.3 billion net loss for the quarter, they're focusing on added subscriber value and overall unit sales this time around. And with those added smartphone sales, new customers are subsequently coming in by the masses according to their earnings report -- mostly thanks to the iPhone 4 and iPhone 4S, and their position as the last U.S. carrier to offer unlimited data contracts.

It looks like that $20 billion bet Sprint made with Apple is slowly starting to pay off.

Source: Sprint