What happens if BBK receives a text message without prompting?

There is no prompt when receiving SMS, which can be solved by the following methods:

1, to confirm whether the speaker is faulty (if the speaker is damaged, after-sales treatment is required);

2. Enter Settings-Status Bar and Notification-Manage Notification to open the notification authority of information;

3. Go to Settings-Voice-Message Ringtone-Change other ringtones;

4. In the standby interface, press the volume plus key to increase the volume of the ringtone;

5. Enter Settings-More Settings-Restore Factory Settings-Restore All Settings/Clear All Settings (Restoring All Settings will not clear the data in the mobile phone, please back up the data in the mobile phone before clearing all the data).