What is the unknown number displayed on the mobile phone?

In addition to the monthly fee, caller ID needs to be charged separately. If you don't pay the monthly fee for caller ID, or accidentally cancel yourself without knowing it, all the numbers dialed to you will be displayed as unknown.

What's more, once you miss this number, you can't dial back. I especially remind everyone that when changing the mobile phone package, you must make sure whether the caller ID will continue to turn on.

Some users just don't turn on caller ID, but use software that can provide caller ID service. That depends on whether there is something wrong with the software you use.

2. Handle the "call hiding" business.

Operators provide this service, and calling number hiding refers to the service that the calling number is not displayed to the other party when the user calls. Calling someone after processing will hide the number and will not record it.

However, this business will not be open to ordinary people, and it is generally only used in special industries such as secret agencies and military personnel. place

3. Hide the number with software.

The above two situations are less likely, but we usually encounter the third one. The other party uses special software to hide his number, which is generally displayed as "unknown number" and "private number". Most of this software is not very safe, so it is better not to use it.

Will this phone be deducted a lot of money?

Usually not. If your mobile phone package is not answered for free, it will be charged normally. However, this kind of incoming call that deliberately hides the number is generally a fraudulent call or a harassing call from a liar. If you receive a fraudulent phone call, your IQ will fall into a short circuit for a period of time, and the loss will not be the phone bill. Even the goddess Tang Wei was cheated by 2 10000. You'd better be careful.

There is also a kind of fraudulent phone call that everyone must have encountered, that is, the phone that hangs up when the bell rings. After this callback, most of them are voice advertisements. If you encounter these strange missed calls, if you are worried about important people such as customers, you can send text messages to test them first.