How does Apple's mobile phone intercept overseas calls starting with 00?

The methods of intercepting overseas calls are as follows:

According to the computer assembly network, 1, the mobile phone number is China Mobile:

Method 1: Edit "190 1" as 10086, and reply "Yes" in the "second confirmation reminder" message to turn off the international, Hong Kong, Macao and Taiwan voice answering function, that is, subscribe to the "international, Hong Kong, Macao and Taiwan call interception" service.

Method 2: Pay attention to the official account of "Ji Ling" WeChat, click "Smart Anti-Harassment" in "My Ji Ling", log in to the mobile phone number and turn on "International Call Interception for Hong Kong, Macao and Taiwan".

2. The mobile phone number is China Unicom:

Method 1: send "GBGJLD" to 100 10, and reply "y" in the "second confirmation reminder" message to turn off the international, Hong Kong, Macao and Taiwan call receiving function.

Method 2: Turn on or off the "overseas call answering" function through the "China Unicom APP"-service handling page. At the same time, Zhejiang Unicom business hall and online business hall can also open or close the international, Hong Kong, Macao and Taiwan call answering function.

3. Mobile phone number is telecom: send "190 1" to 100 1, and reply "190 1Y" in the "second confirmation message" to confirm that the international, Hong Kong, Macao and Taiwan calls are turned off.