How to check the mobile phone number?

If you are referring to the local telephone number:

Vivo mobile phone can enter mobile phone settings-mobile network/dual card and mobile network -SIM card information and settings-mobile/Unicom/telecom/radio and television -SIM card number.

Some SIM cards don't display numbers. You can call your friends and confirm the numbers before displaying them.

If you still have more doubts, you can enter vivo official website-My-Online Customer Service-Enter labor and consult online customer service feedback.