Audio is not working on Call connection

I have initiated an offer from iOS build and tried to connect on the other side android build, Call was connected successfully but Peers were unable to listen each others audio. I am not sure where I am committing mistake. Reply will be appreciated.

RN : 0.59.9
react-native-webrtc : 1.67.1
React : 16.8.6


The code for constraints are down below:

const getLocalStream = () => {
  let constrains = {
    audio: true,
    video: false
  let getStream = stream => {
    localStream = stream;
      streamURL: stream.toURL(),
      status: 'ready',
      info: 'Calling...',
  getUserMedia(constrains, getStream, logError);