the cases: The app registered on a PTT channel Server sent a push notification (using a PTT's token) The app receiving the notification process it and open the link to server to read the data stream the user tap the UI (app's or API) button to send voice message works as well Everything works good until the user is unload the app from the memory but keeps the channel active, in this case the App can't open a network connection to the server side to read or write the data stream, even the user tap the API UI button to send a message.