I'm a bit confused about this topic. I have a T-Mobile myTouch 3G which I've recently replaced with a Nexus One so it's kind of standing there. I was contemplating rooting the myTouch and installing an alternative ROM but I also wanted to unlock it so it can be used with other carriers.
Now, the real questions: When rooting and installing a custom ROM, will that also unlock the phone so it can be used with other carriers? Or is that a baseband feature?