The iPhone classes are at the end of the runtime class list and not in their correct alphabetical position -
http://docs.unity3d.com/Documentation/ScriptReference/iPhoneGeneration.html
(last 2 items in left panel list)

http://docs.unity3d.com/Documentation/ScriptReference/iPhoneSettings.html
(last 4 items in left panel list)
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Three of them are empty. If they are depreciated, then it should be stated and ideally cross-referenced with where the functions/properties can now be found (good case in point would be iPhoneSettings). -
http://docs.unity3d.com/Documentation/ScriptReference/iPhoneSettings.html
http://docs.unity3d.com/Documentation/ScriptReference/iPhoneUtils.html
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iPhone .SetNoBackupFlag could do with more information or examples. I've seen several posts in the iOS forum about this function recently and its clear that developers are unclear as to where the path should point to for various files (e.g. asset bundles). -
http://docs.unity3d.com/Documentation/ScriptReference/iPhone.SetNoBackupFlag.html

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few empty descriptions
http://docs.unity3d.com/Documentation/ScriptReference/iOSActivityIndicatorStyle.DontShow.html
http://docs.unity3d.com/Documentation/ScriptReference/iOSActivityIndicatorStyle.WhiteLarge.html
http://docs.unity3d.com/Documentation/ScriptReference/iOSActivityIndicatorStyle.White.html
http://docs.unity3d.com/Documentation/ScriptReference/iOSActivityIndicatorStyle.Gray.html