Announcing its first fiscal quarter 2010 financial results, U.S. iPhone carrier AT&T revealed that it activated 2.7 million of the handsets during the quarter. Taken with Apple’s sales of 8.75 million iPhones over the same period, it appears that roughly 31% of all iPhones sold during the period were sold in the U.S. By comparison, roughly 42% of iPhones sold during the year-ago quarter were sold in the U.S. Of AT&T’s 2.7 million…
