MREC banner on iPhone?

Hi,

I am confused, I want to use an MREC Banner on an Iphone App.

When using ADAdTypeMediumRectangle, the app gives me this error message

*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'ADAdTypeMediumRectangle is only valid on the iPad.'

on page 3 here it clearly stats iPhone as supported device

https://developer.apple.com/iad/creative-specifications/iad-creative-specificati ons.pdf

same here throughout the document

https://developer.apple.com/news-publisher/iad/Creative-Specifications.pdf

Yet here at the bottom it says MREC only supported at IPAD

https://developer.apple.com/library/iad/documentation/UserExperience/Conceptual/ iTunesRadioAdGuide/AppNetworkBanners/AppNetworkBanners.html

Anyone an Idea what is going on here?

Thank you

Chris