I just came across this topic and had to Google.
Why does it have to be a cell phone that required cell towers? Is cell phone that required cell towers as advanced as we will ever get with wireless technology?
If there is one thing that history has taught us is that predictors of limits on human ingenuity are always doomed to fail. After all, it was laughable that I would be using a computing device thinner than my folder while the most advance computers ran on vacuum tubes.