u/Dark-Mode-Honu

I have been receiving notifications for missed calls but I never heard my phone rang. I have tried uninstalling and then reinstalling the app and/or clearing cache but this missed calls issue continue to persist. Anyone have any suggestion on resolving this issue?

(I have no issue with outgoing calls or with outgoing/incoming text messages. I am using an Android phone and with the TextNow purple SIM card. I got it almost a year ago. My network indicates "TextNow VoLTE 5G".)