The world of cellular technology is full of complicated jargon. And, to make matters worse, carriers can’t seem to agree on what even the simplest features should be called.

In this section of our glossary, we’ll explain the meaning behind the jargon. It’s almost always a lot simpler than it may appear at first glance.

So what’s the difference between “carry-over data” and “roll-over data”? This is where to find out.