AT&T has said that it activated 146,000 iPhone subscribers in its second quarter — June 29 and 30 — and 40 percent of that group were new AT&T Wireless customers, reports The Wall Street Journal. It is unclear whether the subscriber number is a good representation of iPhones sold during that time period, given the fact that so many iPhone purchasers experienced problems during activation and the slightly ambiguous nature of the company’s statement. Overall, the iPhone carrier added 1.5 million subscribers in the second quarter. AT&T also said iPhone sales “continue to be strong in July with store traffic above historical levels.”