In the U.S., Clearwire planned to implement TD-LTE, with chip-maker Qualcomm agreeing to support Clearwire's frequencies on its multi-mode LTE chipsets. With Sprint's acquisition of Clearwire in 2013, the carrier began using these frequencies for LTE service on networks built by Samsung, Alcatel-Lucent, and Nokia.
In 2013, a total of 705 new LTE devices were launched worldwide, of which 304 supported TD-LTE, up from 180 devices in 2012. By the end of the year, LG, Samsung, and Nokia had all demonstrated devices which support TD-LTE, or indicated that they plan to launch devices that support the technology in the future.
http://en.wikipedia.org/wiki/Time-Division_Long-Term_Evolution
