alphadogg writes "AT&T has created different mobile calling models for every major city in America as it tries to improve a network that has come under fire for poor performance as the data-friendly iPhone has proliferated, an executive said Thursday. Other carriers just use one nationwide calling model to plan for all cities, claimed Chief Technology Officer John Donovan, speaking at the Open Mobile Summit conference in San Francisco. The nation's second-largest mobile operator has a hard time planning for bandwidth needs in the rapidly changing mobile world, Donovan said. AT&T has seen rapidly growing mobile data usage — and much criticism over its 3G coverage — as the exclusive iPhone carrier in the U.S.
"If a network is not fully loaded, it's hard to know exactly how much demand is out there," Donovan said. "You put all you can in the ground, and they eat it all up, and then you put more in there, and they eat it all up."" Link to Original Source
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