Speaking during the 4G World conference in Chicago on Tuesday, Sprint’s vice president of network development and engineering Iyad Tarazi confirmed that Sprint will begin to roll-out a 4G LTE-Advanced network in its 800MHz frequency spectrum by the middle of 2013. LTE-Advanced offers faster data throughput than the first generation of LTE, among other enhancements, and Tarazi explained that Sprint’s LTE-Advanced network should offer download speeds between 12-15Mbps. During its Strategy Update meeting in October, Sprint confirmed that it will begin to roll out its first 4G LTE network in mid-2012 with completion scheduled by the end of 2013. The initial LTE network will be deployed on Sprint’s 1900Mhz frequency spectrum and the first round of LTE devices will still route voice calls over its CDMA network. The first voice-over-LTE devices will arrive during the first quarter of 2013, Fierce Wireless said. Tarazi also noted that Sprint will offer at least a dozen LTE devices next year.