How does Apple's mobile phone block advertising messages?

Apple's mobile phone blocks advertising messages as follows:

1. Enable "Filter Unknown Sender" and "SMS Filter": If the received spam messages are sent via iMessage, you can open "Settings, Information, Unknown, Filter Information" in your mobile phone and "Filter Unknown Sender" in turn. After that, the iMessage advertisement message you received will be put into the "Unknown and Filtered Information" in the "SMS" separately, and no reminder will pop up.

2. Use trumpet service: If you are concerned about personal information security, you can use the trumpet service launched by the three major operators and Ali Communications. Online shopping, software registration, taxi, etc. Everyone uses "trumpet" as the contact information to ensure that your real phone number will not be leaked from the source, which can play a role in avoiding spam messages.