I followed this tutorial to get my XNA game running in full-screen mode on WP8:
http://developer.nokia.com/community/wiki/Auto-Scaling_WVGA_XNA_Games_to_WXGA_%26_720P_with_MonoGame_for_WP8
But on iOS it seems to be a different story… Is there a relatively elegant way to auto-scale my WVGA game to full screen mode on iOS devices?