How does PHS intercept incoming calls with hidden numbers?

Hello, before the popularity of mobile phone software, as long as your mobile phone is a smart phone, it can be realized:

At present, mobile phone security software has the function of "reporting" and "marking" fraudulent phone calls and fraudulent information. Tencent mobile phone housekeeper invites you to mark. Your own report/tag can benefit hundreds of millions of users, and other people's tags can also keep you from being cheated. The operation method is as follows.

1. Install Tencent mobile phone manager and turn it on. The manager will automatically intercept "ringing phone" and "common scam messages" and prompt you to mark them.

2. After interception, you can only view the intercepted phone records through the "Harassment Interception" function in "Security Protection".

3. The housekeeper also provides the function of modifying the "mislabeled" phone. At the "Digital Mark", click "I want to correct my mistakes" to make changes. At the same time, you can see the recently marked number as shown in the figure below. Click "Mark the nearest strange number" to directly mark the recent incoming call.

4. In the "Spam SMS" column, you can view the recently intercepted spam messages, and click the message "Delete, report, add more (restore to mobile phone inbox/join whitelist/blacklist)", as shown in the following figure:

5. In addition, click "Settings" in the upper right corner, and the housekeeper provides more personalized function options, which you can set one by one according to your daily needs:

The above is an introduction to the operation when encountering fraudulent SMS and fraudulent phone calls. Tencent Mobile Manager welcomes you to experience.