An oppo mobile phone can see everything by sending a text message. How to set invisible content?

Open the phone desktop and click "Settings";

Click on the "Settings" interface to open the "Notification and Status Bar";

Click to open "Notification Management", select the application to be set, and click Open;

Just turn off the Lock Screen Display option.

Other methods:

Click Settings on the desktop to enter information;

Then turn off information anti-harassment;

If this function is turned on, the message of strange number will be silent (this function may not be available on some models).