I use the White-list feature in settings ,, so like the news,Imovies all those stock apps are not on there , with my settings we only allow meraki Sm and 2 other apps so i have those whitelisted and few others like Settings,notes,tips, and other basic ones , it also helps to use the restrictions under general , and use a separate pass code that the end user does not know
also the WEATHER that comes with the ipad will use data in the background