Verizon and AT&T recently posted Q3 earnings figures, both noting customer additions, and now we have an idea of where the customers are coming from: Sprint. The carrier published its third quarter 2013 earnings on Wednesday, noting a net loss of 360,00 customers under contract. Meanwhile, it gained 84,000 prepaid subscribers and 181,000 wholesale subscribers. Sprint now serves 54.8 million customers in total.

Despite a decrease in subscribers, Sprint pulled in a profit of $383 million for the quarter, a large improvement over the $767 million net loss posted during the third quarter of last year. The carrier also sold 1.4 million iPhones during the quarter and 40 percent were sold to new customers, though that’s a fraction of the iPhone sales Verizon posted. 5 million total smartphones were sold in total, Sprint said.

It might be too early to tell, especially since T-Mobile hasn’t posted earnings yet, but it’s possible that T-Mobile’s new “Un-Carrier” plans are stealing Sprint’s customers. Likewise, T-Mobile now has the third largest 4G LTE network, which means Sprint is lagging behind AT&T, Verizon and T-Mobile, despite just recently adding a host of new 4G LTE markets.