People whose caller ID does not show up usually belong to the following categories of people:
1. Some special service numbers, such as express company customer service numbers, Xingfeng hotline customer service numbers, etc.
2. Network virtual number.
3. Suspected fraudulent calls, advertising sales calls, etc.
These calls are usually automatically dialed by the system, so the caller ID will not be displayed. In addition, some phone numbers may have restrictions set by the called party and cannot display caller ID.
Not displaying the caller ID means that the caller ID is disabled, which is a special feature provided by the telecommunications network based on the basic calling function. Caller number display refers to the service function that the system can provide and display the calling party's phone number to mobile phone customers when they are called.
Through this service, customers can decide whether to answer the call based on the displayed call number before answering the call. They can also check or dial the number of answered calls and the numbers of unanswered calls.
Related events
On November 20, 2014, Ms. Xie, who worked in a unit in Ganzhou City, received a call from a hidden number. The caller ID only read "Caller ID is not displayed "A few words. A few seconds later, the phone rang again. After hanging up again, the number was still not displayed. This repeated for 2 hours.
Ms. Xie was forced to shut down her phone. But within a few hours, the undisplayed number had called her nearly a thousand times. When Ms. Xie turned on her phone again, the call "Caller number not shown" came in again. "It hung up almost as soon as it rang, and then rang again after a while."
Because his mobile phone has been harassed by this "number not shown", there is almost no interval, and it rings frequently and then hangs up, making his mobile phone a decoration. Not only can he not answer other calls, but he can also send text messages continuously. and WeChat have become problems, and life and work have been greatly affected.