Joke Collection Website - Public benefit messages - How does "oppo r7s" mobile phone keep short messages secret?

How does "oppo r7s" mobile phone keep short messages secret?

SMS encryption method:

Click the menu button in the lower left corner of the phone screen and select System Settings from the pop-up menu.

Click "Security and Privacy".

Click "Privacy Protection".

Turn on access restrictions.

Draw the pattern password and confirm it.

Click Set Access-Restricted Applications.

Enter the mode password you just set.

In the list of applications, open the SMS project.

Now when we open the SMS, we will find that we need to enter the pattern password.