To summarize...
When GlobeTel was pushing cell towers in the sky, it wouldn't have worked with existing cell phone technology anyway. In their defense, they had Hotzone which may work differently than traditional cell phone technology. In fact we know it is different, because it doesn't work at all. It was a complete failure everywhere it was tried.
But not to worry, the nonexistent communications technology needed for the nonexistent airship is probably just around the corner.
That's the story, they might as well stick to it. It's worked for the insiders for years!