1, turn off the power saving mode and sleep mode for observation and use;
2. Enter I Housekeeper-Traffic Management-Traffic Saving Mode-Traffic Saving Mode-Turn off the switch.
If the above methods are not effective after operation, you can go to official website /vivo Mall APP-My-Online Customer Service or vivo official website Web Edition-Sliding Bottom-Online Customer Service-and enter the manual customer service for consultation and understanding.