You tend to see similar terms around the "fair use" of free EU roaming. Some of them even threaten back charges if it turns out you used more data abroad than

You tend to see similar terms around the "fair use" of free EU roaming. Some of them even threaten back charges if it turns out you used more data abroad than at the home country over a long enough period. I called their bluff once and got away with it, but their systems may have improved since then