"We especially want to know more about the potential for abuse of mobile data services. Are your users streaming movies or playing games on the company smartphones and cellular-enabled laptops? If so, what do you do about it?"
The exact question I thought was going to be addressed.
Quantifying abuse of company communication is easy, running logs through scripts is all it takes. Qualifying that use is something else.
In a small business with a few dozen mobile device users, whom you actually meet from time to time perhaps get on a first name basis with, it is not difficult to understand usage habits. If a user starts to get a bit excessive with usage, a friendly word in the ear is all it needs. If someones usage is up because they are making a lot of calls to a sick relative, discretion can be used.
<sarcasm style="just in case it isn't obvious">
Larger companies where the user is just another asset and perhaps not really seen as a person at all, does it really matter? Have bill analysis software do it all, isolate the abusers, warn then, if usage still continues to be too high, have the bill analysis software send them their P45. Simple algorithms are all that is required. The analysis of usage patterns for voice and data should up with some figures to use as triggers. </sarcasm>