ZTE has announced that company helped China Mobile deploy voice over LTE (VoLTE) services on the operator’s commercial TD-LTE network in Guangzhou. The VoLTE services on China Mobile’s TD-LTE network, constructed by ZTE, supports enhanced Single Radio Voice Call Continuity (eSRVCC) switching for seamless handovers to non-4G networks. 

eSRVCC technology complies with the LTE-A 3GPP R10 standard, greatly reducing latency times when switching voice services between the 4G network and 3G or 2G networks, ensuring that users do not perceive any change when moving between different networks. The VoLTE deployment in Guangzhou was also enabled by a newly-built IP Multimedia Subsystem (IMS) system provided by ZTE. 4G smartphones with Qualcomm® Snapdragon™ 800 processors were used.

The successful VoLTE deployment by China Mobile was completed using network systems and terminals used from different vendors. 

Earlier, in July 2013, ZTE cooperated with Qualcomm to conduct a VoLTE test using commercial terminals in China Mobile's lab. In December 2013, ZTE completed calls over TD-LTE VoLTE between Guangzhou and Tianjin.