If you are using a vivo phone, you can check the following information:
1. Set the video ringtone for incoming calls locally: Go to Settings--Sound and Vibration--Incoming Call Ringtone--Video Ringtone- - Check local video ringtones/download i-themed video ringtones/customized video ringtones for incoming calls.
2. Set video ringtones in i theme: Enter i theme--Recommendations--Video ringtones--Choose your favorite video ringtone--Download/Buy now--Select "Apply as ringtone"
Note: Currently, only some models support this function and do not support custom video ringtones.
3. Contact the operator’s customer service to activate the video ring-back tone service. Currently, only China Mobile, China Telecom, and China Unicom support the video ring-back tone service.
China Mobile: 10086
China Unicom: 10010
China Telecom: 10000
For more questions, please visit the vivo official website-- My--Online Customer Service--Enter manual input and consult online customer service for feedback.