When was Unicom's 4G network put into commercial use?

20 14 since March 18, China Unicom has launched a 4G network.

20 14 05 17 56 cities in China have covered Unicom's TD-LTE network. They are: Beijing, Jinan, Qingdao, Yantai, Weifang, Shanghai, Chongqing, Tianjin, Shijiazhuang, Baoding, Tangshan, Qinhuangdao, Chengdu, Yinchuan, Haikou, Sanya, Taiyuan, Hefei, Lanzhou, Shenyang, Dalian, Changsha, Wuhan, Changchun, Nanchang, Kunming, Xining, Harbin, Guangzhou, Shenzhen and Dongguan.

20 14 On June 27th, the Ministry of Industry and Information Technology approved China Unicom to carry out TD-LTE/LTE FDD hybrid networking experiments in Shanghai, Guangzhou, Shenzhen, Chongqing, Zhengzhou, Wuhan, Chengdu, Xi 'an, Changsha, Jinan, Hangzhou, Shenyang, Harbin, Fuzhou, Nanjing and Shijiazhuang.