AT&T chief technology officer John Donovan last week confirmed the US carrier had been unprepared for the US success of the iPhone 3G.
Speaking at the Goldman Sachs technology conference last week, Donovan admitted that the network had seen demand for 3G services in some areas exceed expectation to the point AT&T was forced to build up capacity.
Universities that bought iPhones and developed applications for students were among the groups that created zones of high demand, he admitted.
Problems in the provision of 3G coverage have caused controversy and comment in the US, with some customers recently filling lawsuits against Apple and AT&T saying the 3G network is overloaded and unable to deliver the level of performance the partners promise within local iPhone advertising.
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