That might depend on your country of residence, but in Europe we have the right to all non-confidential data associated with us from any company that isn't "prohibitively expensive" to obtain, such as "all video footage with me in it from 2010 to today".

In this case though, it shouldn't be prohibitively expensive to obtain, as it forms the foundation for tracking the use of your data plan. If it was prohibitively expensive to obtain, they wouldn't be able to tell you, when you hit your data cap.