In the documentation of AT command for CDMA, I find that when we start a call with ATD123456789, there is differents response. There is a response: "WCNT:9 the caller can hear audio of the calling party's phone ringing. However this event does not means the other calling party has answered". When a trying to send the ATD123456789 from adb on my Android phone, they make me:
ATD123456789;
OK
but not the response WCNT:9. Some one can help me, why WCNT:9 don't display. And if there is another solution to detect the time of playing audio of the calling party's phone ringing. Thank you and sorry for my poor English.