What should I do if my oppo phone can't receive SMS?

It may be because the mobile phone is in arrears, so I can't receive the text message, and I need to charge the phone bill to receive the text message. It may also be that there is something wrong with the settings of the mobile phone. The solution is as follows: 1. After the phone is unlocked, open the settings in the phone; 2. Slide down to the bottom of the settings page, find it and enter the "System Application" option; 3. You can see the "Information" option in the "System Application" option, and click to enter; 4. In the information interface, open the buttons next to "Display as soon as you receive the short message" and "Display as soon as you receive the short message". The above is to introduce how to do if oppo mobile phone can't receive SMS. I hope it will help everyone. This paper is based on oppoReno4 brand and ColorOS 1 1 system.