Connectionstatechange is getting failed

I’m using two devices (iOS and Android). When iOS device creates a new call, the event connectionstatechange returns failed.

I’m using Socket.IO for signaling server;
expo: 48.0.15;
react-native: 0.71.7;
react-native-webrtc: 106.0.6;

Are you using a working STUN and TURN server?
How are the devices connected together?

Could be a range of causes but usually the common one is wonky network conditions.

I’m using google STUN server (