(I guess my search for this topic wasn't thorough enough, because I just posted a similar question - oops).
At any rate, we are having the same issue with a Nokia Lumia 822. The OS is Windows Phone 8 and, in theory, should work. Isn't that the point of using a windows OS?
I'm not sure if the issue is from an incompatibility with the OS, a problem with the ArcGIS app, or some kind of permissions problem, but it seems unlikely that it would be a permissions issue since we don't have this problem when accessing content from an iPad or Android device.