This broadband performance test system is commissioned by the Office of the Communications Authority (通信事务管理局办公室 / 通讯事务管理局办公室), formerly the Office of the Telecommunications Authority (电讯管理局 / 电讯管理局), and designed, established, operated and supported by Hong Kong Internet eXchange. The data usage for the use of this system varies with the speed of mobile broadband connection under test. For tests on 4G connections, the data usage of a test can be up to 100 MBytes. Users are advised to keep track of their data usage from time to time in order to avoid any unnecessary mobile bill charges.