Sprint has indicated via filings with the Securities and Exchange Commission that it will cease operating its WiMax network by the close of 2015. The company had previously committed to running its first-generation 4G network through 2015 and it is making good on that promise. At one time Sprint's WiMax network had about 17,000 sites operating. It has already repurposed about 5,000 sites for TD-LTE and plans to repurpose another 5,000 - all for its tri-band LTE Sprint Spark service. Sprint has launched Spark in about 20 markets and plans to reach 100 by the end of 2016.


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