In Atlanta, Sprint Nextel, Motorola, Verizon and AT&T are spending billions of dollars building complex networks capable of delivering video programming and wireless products.



With 48 million subscribers, Sprint Nextel controls only 23 percent of America’s cellphone market. Yet customers with two-year contracts from Cingular, Verizon Wireless and other carriers may be hesitant to switch to Sprint because of the early termination fees that can cost up to $200.



Cablevision, which has a separate deal with Sprint, gives customers, who order a Sprint phone, a $70 cash credit that can be spent on Cablevision services. The company also does not charge for calls between Cablevision home phones and Sprint cellphones for one year.



Sprint Nextel and its cable partners are still working out the details of what the other video programming they might provide over the cellular network.



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