AT&T, Apple Struggle to Handle iPhone Orders

Although the scope of the problem and its underlying cause couldn't immediately be learned, some AT&T customers, who were logged into AT&T's website as themselves ended up in other users' accounts.

AT&T and Apple didn't immediately comment on the apparent glitch.

(...) Apple's iPhone 4 officially goes on sale June 24, but AT&T and Apple began accepting preorders Tuesday. Almost immediately, would-be buyers began complaining they were unable to complete order requests through AT&T's or Apple's websites.

AT&T said the day was the busiest for online sales in the company's history, but didn't say how many units were ordered. All iPhone 4s that could be preordered for delivery on June 24 sold out, the company said. Customers who order now will get devices on June 25 or later. There will also be iPhone 4s available in stores on June 24, AT&T said.