Joke Collection Website - Blessing messages - Why doesn't Oppo mobile phone display message delivery?

Why doesn't Oppo mobile phone display message delivery?

First, we open the settings in the phone.

2. After opening the setting options, slide the phone screen upward to find the information options.

3. Open the information page and find the notification management.

The license notice is displayed here, and the switch at the back is gray, indicating that it is closed now.

5. Click to turn it green. Indicates that this feature is turned on.

6. Send a text message after opening it, and there will be a prompt tone and a lock screen display.