That wasn't the point at all. You were sneering at others because you had converted the numbers into GB/s and those numbers looked small, but the only foolishness was doing the conversion in the first place and the only person doing it was you. A billion messages of any size is nothing to sneeze at. Have you ever worked on a system that handled that many messages in its entire lifetime, let alone a single day?

P.S. There's no such thing as a 1985 GSM network. That phrase just makes your comment look even sillier.