So will making iAD.framwork optional & handling codes related to this do the trick?
**Update:
Unfortunately the cause of the crash was -[__NSCFString containsString:]: unrecognized selector sent which was iOS version fault & not device fault. I got it resolved. sorry to iAd for blaming or trying to blame. Long live iAd. Thanks**
Solution
First of all - you need crash details. Without it, nobody help you.
Integrate any crash reporter SDK: Crashlytics or anything like this.