More than a year after the fight against crank calls, China Mobile officially launched a function to prevent repeated dialing crank calls in 31 province-level administrations including provinces, districts and municipalities. VoLTE users of China Mobile in 31 province-level administrations can activate this function free of charge. Previously, this function was available in only a limited number of areas.
Users can also set blacklists, whitelists, custom numbers and other functions freely.
For a long time, operators have been blamed by the public and criticized by various official media for crank calls. Although this function can not prevent all crank calls, some progress has been made.