AT&T sold 4.8 million iPhones in the first quarter.
The company sold 6 million smartphones in total.
The number almost certainly means that AT&T continues to be the largest retailer of iPhones in the U.S. Verizon Wirelessin the same period. Sprint Nextel reports its results tomorrow, but it's unlikely to top AT&T's number.
AT&T added 296,000 net contract customers in the first quarter.
All the latest Apple news, featuring developments on the iPhone, iPad, Macbooks, OS X and much more.
May 24Apple gives free app development curriculum to schools
May 24iPhone 8 dummy mock-up brings rumors to life
May 24iPad Pro 2: Everything we know so far about the next edition of Apple's iconic tablet
May 24Picturing the iPad Pro 2: 'Leaked' images, renders, and concept designs of Apple's next tablet