I upgraded my Nokia 7plus to Android 9 this month. After the upgrade I'm facing issue with my receiver. Whenever I make a normal call, sometimes I don't hear anything (callertune, no other sound) I tried to on loudspeaker also. This issue happens frequently. But there is no issue in WhatsApp call. There is no issue with receiver and loudspeaker, I tested it.
Is there anyway to fix this issue.