According to your description, I suggest you restore the original version of the firmware. You can go to official website to download the ROM package. The address of each model's Rom package is/service.html. Enter this link, click "Service"-search your phone model in the search box, then select the model, click "Resource Download"-firmware upgrade, and download the complete ROM package.

This is a tutorial, you can have a look. Machine operating instructions:/thread-1024055-1-1.htmlBefore brushing the machine, it is recommended to back up the mobile phone data to prevent data loss.

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