There is no sound or vibration in the short message sent by A9. What happened?

If there is no prompt tone when the mobile phone receives the short message, I suggest you:

1. Check whether the phone is silent.

2. Set the notification volume of the mobile phone: Settings-sound and notification (sound)-volume-notification, and increase the notification volume.

3. If there is still no prompt tone after receiving the SMS, please check whether the SMS prompt tone is set to mute. Operation: information-more-settings-notification-sliding switch-prompt tone-selecting ringtone.

4. Try to replace the built-in system ringtone.

5. If not, please try to update the version of the mobile phone system: Settings-About the mobile phone (about the device)-Download the update manually/download the update automatically (software update/system update-update). Note: Please back up the data in the device before upgrading.

6. If it is the latest version, please back up the data in your phone and try to restore the factory settings.

If the problem still exists, please bring the purchase invoice, maintenance card and machine to the Samsung service center, and the professional after-sales engineer will help you carry out the inspection.