Yeah, I don't really expect a mobile O/S to keep connections open indefinitely. It's hard enough to do that when the phone is awake and on the move, much less s

Yeah, I don't really expect a mobile O/S to keep connections open indefinitely. It's hard enough to do that when the phone is awake and on the move, much less sleeping. The O/S should, however, honor an app's request to wake up every 5-15 minutes to open a new connection, do some things with it, and go back to sleep. Especially if the user has given explicit permission to let the app in question use all the battery it wants. Periodic wakeup is what most email apps expect when they're set to "polling" mode. It used to work perfectly until about two years ago. It doesn't work anymore on recent Samsung phones. The system just ignores the wakeup schedule set by the app.