Why does vivox5 SMS always disappear?

According to your description, I suggest you try the following methods:

1. Enter the information and click the left menu button-More-Settings-Restore the default settings.

2. Enter Settings-More Settings-Restore Factory Settings-Restore all settings, and click Restore to restore settings without losing data.

3. Enter Settings-More Settings-Restore Factory Settings-Clear all data. Everything stored in the phone's memory will be deleted. Please make a backup first.

4. I suggest you go to official website to download the firmware upgrade package to restore the system. Address of firmware upgrade package for each model:/service.html. Enter this link, click "Service"-search your phone model in the search box, then select the model, and click Resource Download-Download rom package. This is a tutorial, you can have a look. Description of firmware upgrade:/thread-1024055-1-1.htmlBefore firmware upgrade, it is recommended that you back up your mobile phone data to prevent data loss.

If it still doesn't work, you can go to the local after-sales service center for testing and handling. You can check the address of the after-sales service center on vivo official website:/service/map.html.

If you have any questions, please feel free to consult us. Thank you very much for your support of our vivo, and wish you a happy life!