Apple completely smashed that. Carriers now, for the most part, accept that they don't get to decide what your phone does, only how you use your connection with them. The carriers used to do things like disable Bluetooth and charge you extra to turn it back on, or force all apps to go through their own internal approval process and purchasing.
I'm not terribly happy with the status quo Apple has left us with. Rather than place control with us where it belongs, they've just moved control to Apple. Apple is a far better overlord to have than the carriers, but it's still not great. However, we should still recognize that Apple pulled off a massive change that nobody really thought could be done.