How does Apple intercept virtual text messages?

Apple's mobile phone with iOS system can block short messages with the help of mobile phone settings.

The operation mode is also very simple: open the settings, find the information, drop down to find the function of filtering unknown senders, and open it. Or the mobile phone housekeeper can filter with one click, just turn on spam filtering directly in the mobile phone housekeeper, which can filter spam more efficiently, and take unsubscribe, unsubscribe, T-back and T-back as the keyword blacklist.

Spam messages refer to messages that users don't want to receive without their consent, or messages that users can't refuse to receive according to their own wishes, which mainly include the following attributes: (1) messages such as business and advertisements sent to users without their consent; (two) other short messages that violate the self-discipline norms of the industry. The proliferation of spam messages has seriously affected people's normal life, the image of operators and even social stability. For example, a pseudo base station can send letters to 65438+ 10,000 mobile phones within three kilometers. Now users can use mobile phone housekeeper to intercept such messages.