Yesterday Apple announced that during its second fiscal quarter of 2010 it had sold 8.75 million units worldwide, today the official US carrier of the iPhone AT&T announced that it had activated 2.7 million of those.

In the carriers earnings report the company said that signups of wireless customers under contracts dropped 43 percent year-over-year to 512,000. If you were to exclude iPhone signups that figure would have been negative.

AT&T says that it activated about 900,000 iPhones for new customers and 1.8 million iPhones were activated for customers who were already part of the carrier.

AT&T’s consolidated revenues totaled $30.6 billion, up $78 million, or 0.3 percent, versus the year-earlier quarter; operating expenses were $24.6 billion versus $24.8 billion; operating income was $6.0 billion, up from $5.7 billion in the first quarter of 2009; and AT&T’s operating income margin was 19.6 percent, up from 18.8 percent in the year-earlier quarter.

First-quarter 2010 net income attributable to AT&T totaled $2.5 billion, or $0.42 per diluted share, reflecting a previously disclosed noncash charge of $995 million, or $0.17 per diluted share, related to recently enacted changes in the tax treatment for the Medicare Part D subsidy. Excluding this charge, first-quarter earnings would have been $3.5 billion, or $0.59 per diluted share. These results compare with net income of $3.1 billion, or $0.53 per diluted share, in the year-earlier first quarter.