prevent Metro Talk from closing the app when the back button is pressed.
When clicking going through messages and pressing the back button, it becomes inconvenient restarting Metro Talk from the WP8 home screen when the back button is pushed too many times.
Most people would want their Metro Talk open all of the time working in the background for easy access to messages and contacts whenever they click the Live Tile.
To close Metro Talk, it should be a separate option in settings or elsewhere.
I’m sorry but this violates Microsoft’s app store guidelines, and would get the app rejected upon submitting. I do like the idea though.