My vivoX6D received a text message with no prompt and no sound. Moreover, the system can't be upgraded, the cache is emptied, and the loudest sound can't be restarted.

It is recommended to try the operation according to the following methods:

1. Go to Settings-Sound-Turn on the SMS prompt tone, or go to Settings-Status Bar and Notification-Find SMS to turn on the display and notification.

2. Try to restart the phone, or try to upgrade the system.

3. Go to Settings-More Settings-Restore Factory Settings-Restore all settings and try it.

4. Try changing the environment or changing the SIM card.

5. Enter Settings-More Settings-Restore Factory Settings-Clear all data and try.

6. Try the firmware upgrade: you can go to official website to download the firmware package of the corresponding model. Path: Go to the home page of vivo official website-Services-Search for the corresponding model, and click Resources to download the firmware package. The specific operation tutorial: Go to official website Home Community-Plate -V Powder Playing Machine-Playing Machine Skills-Search official website Firmware Upgrade Operation Tutorial. There are detailed steps in this post.

7. If it still doesn't work, I suggest you go to our local after-sales service center to check your mobile phone: the address and telephone number of the after-sales service center can be found on the homepage of vivo official website-Services-Network.