M66 echo cancellation


I am working on setting speaker and mic for our application. I am using M66 modem.

I have implemented a calling feature which both loudspeaker and mic use same audio channel (channel 2).

When the call is in progress, other party listens echo of his own voice. I tried below settings using AT+QAPS. No change in the echo issue. Could anyone suggest the best settings to have 0% echo.

Best Regards,

I have seen your issue in another forum, and if you follow the documentation Settings,the issue still exist,
please contact support@quectel.com