How to set SMS password for oppo A37?

Open the phone screen and click Settings.

Select the account and security service command in the security column.

After opening the security service, drop down on the screen to find the personal security bar, and then select the program encryption command.

Open the settings icon to the right of program encryption to turn on program encryption, and then click the encryption program below to select the program to encrypt.

Then select the program you want to encrypt from the unencrypted programs, light the open icon, and you can see your encrypted program in the encrypted program column.

Then go back to the homepage of program encryption, select Settings, and you can set the password of program encryption. Select the change password option, and then draw a pattern. When you open the encryption program again, you need to draw a password pattern.