Recently, I often receive a bell in the middle of the night, and two incoming calls are not displayed. How to solve it?

This kind of phone call is usually a fraudulent phone call. If you think about it before disconnecting, people who don't know will call back, and then it's usually winning information or something. Generally, no department is willing to take care of this kind of harassing phone calls, whether it is the network management department, the information management department or China Mobile Unicom. They are all busy making money, which is nobody's business in Xiao Pi. It's no use blacklisting Because the numbers change frequently. The only way is to turn off your cell phone or mute it when you sleep at night. If you are afraid of someone looking for you, if your mobile phone has a personalized ringtone setting, you can set the people in the address book as ringtones and mute strange calls.