[lnanek2]

I think you are a little out of date on mobile development. This has always been easy on Android, and many apps show a notification while they are upload large images, like Facebook. Any Android app showing a notification can request foreground scheduling priority for a background process. iOS7 recently caught up as well with background app refresh letting you make requests to a content server in the background without being started, just the system starting you regularly. Not that the iOS4 ten minutes after use background task was usually insufficient and the server failing to see it complete could have been used to send a push anyway...