The mobile phone verification code is not displayed at the top.

Not displaying on the top is a problem with mobile phone settings, which can be solved by referring to the following methods, taking Huawei's mobile phone operation as an example:

Step 1: Open Huawei's mobile phone and click Settings on the desktop, as shown in the figure below.

Step 2: After setting, click Apply, as shown in the following figure.

Step 3: After entering the application settings, click Application Management, as shown in the following figure.

Step 4: In the application management interface, search for "Information" and click Enter, as shown in the following figure.

Step 5: After entering the SMS setting interface, click Notification Management, as shown in the figure below.

Step 6, enter the SMS notification management interface, set the notification authority, and turn on the status bar display, banner and screen lock display. After opening, the SMS will be displayed in the notification bar, as shown in the figure below.