unity3d - unity iOS app is rejected because of iAd -

i struggling submitting ios app. using unity 5.1.1f1 version build ios app gets rejected because of ads. used unity built-in adbannerview show ads. thought see test-ad on device, apple still rejects saying:

we still found app uses ios advertising identifier not include ad functionality. not comply terms of ios developer program license agreement, required app store review guidelines. specifically, section 3.3.12 of ios developer program license agreement states: ..

some people change answer in itunesconnect no (does app use advertising identifier (idfa)?) , modify functions in xcode (i did , app still did not pass)

note: haven't tried changing itune answer (looks scary)

how can overcome last hurdle? highly appreciated :)