How does Apple's mobile phone block spam?

Add the harassing number to the "blacklist": Select the number to be blocked, and click "Block this incoming number-Block contacts" so that you won't receive harassing messages from this number.

Block SMS with unknown number: Open "Filter Unknown Sender" in "Information-Location and Filter Information" to filter unknown harassing information.

Blocking unknown number SMS function: Open the settings and select "Information" in the mobile phone, and select "Unknown and Filter Information" to open "Tencent Mobile Manager".

Go to the homepage of Tencent Mobile Manager, select "Harassment Interception", click "Open Now" in the item of "Spam SMS Filtering Function", and after the "Spam SMS Filtering Function" is turned on, you can isolate harassing SMS to unknown and power SMS folders.