If you use a vivo phone, you can go to Settings-Mobile Network/Dual Card and Mobile Network-Mobile/Unicom/Telecom/Radio and Television-Access Point (APN) to make relevant settings.

It is recommended to use the default access point of the mobile phone, and changing the access point may affect the network; For more questions, please enter vivo official website-My-Online Customer Service-Enter manual consultation online customer service feedback.