Sprint Nextel plans to shut down its narrowband iDEN network as early as June 30, 2013, the company revealed on Tuesday. Previously, Sprint has said it would support the network until 2013. Ending the service enables the company to use the airwaves for more advanced services, such as the high-speed mobile broadband network known as 4G LTE. About 5.4 million customers used the iDEN network as of the end of September, according to a Sprint spokesman. Of those users, 3.8 million are post-paid users with the ...

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