Code  Country             Standard   Startup Subscribers Subs Date    Operator                               U.S. Partners            Vendor              Coverage                 Other
CH-20 China               TACS       1993?                            Tianjin PTA                                                     Motorola            Tianjin
CH-20 China               TACS       1993?                            Tianjin PTA                                                     Ericsson            Tianjin