It is recommended that you troubleshoot as follows: Whether the mobile phone is enabled to allow APP to use the mobile phone microphone; Whether to open the microphone function of the APP video interface; Whether the ringtone of the mobile phone is turned on, and whether the volume of the ringtone is too low (when using the conversation function, the channel of the ringtone of the mobile phone is used instead of the channel of multimedia. This is determined by the communication protocol of the mobile phone. ) If all of the above are normal and you still can't talk, you can click "Continue Feedback" to submit your question.