If you use a vivo phone, please check the phone model as follows:

You can go to Settings-System Management/More Settings-to view the phone model; You can also check it on the label on the box.

Some models need to enter the Settings-My Devices view.

If you have more questions, you can enter vivo official website-My-Online Customer Service-Sliding Bottom-Online Customer Service-Enter Manual Customer Service and enter the consultation.