TD-LTE devices are close to hitting the market, according to ZTE, which has completed what it says was the world's first TD-LTE to 2G/3G handover test.
The Chinese vendor said it had demonstrated interoperability between TD-LTE terminals and GSM, UMTS and CDMA EV-DO networks.
Some operators have been reluctant to deploy the 4G technology due to concerns about TD-LTE multi-mode terminals, but ZTE claims its tests demonstrate the maturity of the standard's ecosystem.
The China Mobile-backed TD-LTE standard is gaining traction worldwide. As of April, ZTE alone had deployed TD-LTE trial and commercial networks for 25 operators in 15 countries throughout Asia and Europe.
Indian incumbent Bharti Airtel will adopt the protocol and a Softbank unit and US wireless operator Clearwire have revealed that they will test the technology, WSJ said.
China Mobile has itself built a trial network in six cities, and has teamed up with FarEasTone to trial the standard in Taiwan.
ZTE on Friday revealed it had secured a $900 million loan with 10 international banks to help it further expand internationally.