Announcing its fourth quarter 2011 fiscal results today, original iPhone carrier AT&T announced that it activated 7.6 million iPhones over the three month period. The majority of those sales were iPhone 4S units, according to the company, and overall, iPhone sales accounted for 80 percent of all AT&T 9.4 million smartphone sales. The sales helped the company add 717,000 net postpaid subscribers during the period.
