Carrier Settings Update in iPhone

This afternoon when I plugged in my phone to sync with iTunes, which I do only about once a week in order to grab new podcasts — hey, everything else is synced over the air, “automagically” — I got a pop-up telling me that there were new carrier settings, would I like to install them? I haven’t checked out what they are, but [MacWorld has an explanation of the files involved and how one can edit them](, if need be. Am I saying that I don’t completely trust AT&T and Apple at all times? Why, yes, I guess I am.