Sprint shutting down WiMAX by end of 2015

Sprint's WiMAX network isn't long for this world. The first "4G" network to launch in the United States, WiMAX was hampered by Sprint's available spectrum and shamed by the speeds brought on by the launch of LTE on Verizon and AT&T. Having thrown in the towel on WiMAX and rushed to launch their own LTE network, Sprint is now paving the way to shut down their old WiMAX network by the end of next year.

source: androidcentral