AT&T has dropped its controversial $39 billion bid for Deutsche Telekom's wireless U.S. unit, bowing to regulatory opposition over the deal that would have made it the largest cellphone operator in the country. AT&T had said it urgently needed to buy T-Mobile USA to help overcome a spectrum shortage, while Deutsche Telekom saw it as a way to exit the U.S. market to focus on its European operations. Once a cash cow, T-Mobile USA has been losing customers. "It was definitely a miscalculation (by AT&T)," said Steve Clement, an analyst at Pacific Crest Securities.
