phone calls as we know it are going to go the way of the dinosaurs, we need trusted communication systems
Now, how is this relevant? Well, the entire cell network was offline, at least for some providers. At first it wasn't possible to send/receive data. Calls were connecting, but my friend sounded like an alien. Then for one hour, 0 communication was possible.
So even though the most efficient (I think?) protocol was used, it came to a halt