Been working on this over the weekend on my app - I've got it set up so if MobileAdvert fails to configure or MobileAdvert fails to load (using 'on configuration failed' and 'on banner failed to load') then text boxes appear indicating which.
Both text boxes appear meaning that MobileAdvert fails to configure on iOS and so the banner fails to load.
So the initial issue is getting the banners to configure on iOS.
If — has his banners configuring and loading on iOS perhaps its a clash with other plugins that we're using.
The plugins I'm using are: Audio, Browser, Function, GameCenter GooglePlay, LocalStorage, MobileAdvert, Mouse, SocialSharingPlugin, Touch.
— which plugins are you using in your app - I'll delete those that don't match yours and see if there's a clash. Also, are you building via Xcode or Cordova?