Which system of Apple can prevent spam harassment?

You can take the following ways, but the text messages of strangers will also be affected, as follows:

1. Open the spam message you want to block in the message, click "Details" in the upper right corner, click "More Information" icon, then click "Block this calling number" option in the introduction interface, and finally click "Block contact" option to block all messages sent by this number.

2. Open Settings-Notification-Message on the main screen, and select "Reminder from my address book only" in the setting list of information notification to block the display of strange spam messages and sound reminders.

3. Close the account that accepts iMessage, or completely close the iMessage function, which can solve the spam messages from iMessage.

4. Enable Do Not Disturb mode, and find "Do Not Disturb Mode" in the setting list. The uninterrupted time period when the system is automatically turned on is from 22: 00 pm to 08: 00 the next day. During this time period, all messages will be blocked, and there will be no display or prompt tone.