how can possible only audio calling using quickblox in android?

Question

I am using this code for audio calling and start call but how can another user receive incoming call ? please check this Screenshot link

 List<Integer> opponents = new ArrayList<Integer>();
            opponents.add(Integer.valueOf(quickBlox_Id)); //12345 - QBUser ID
            Map<String, String> userInfo = new HashMap<>();
            userInfo.put("key", quickBlox_Id);
            QBRTCSession session =QBRTCClient.getInstance(this).createNewSessionWithOpponents(opponents, QBRTCTypes.QBConferenceType.QB_CONFERENCE_TYPE_AUDIO);
            session.startCall(userInfo);

Answer 1

Is the user ID of the another user is correct?

Try to call him with creating another account. I think users must not use same credentials to call each other. Please use different credentials and test again. It might work.