I just arrived in this thread but I would argue strongly that GPS are not fake, or hoaxed using radio towers.
Nobody is proposing that, nor is anyone discussing any properties of GPS (or, more accurately, RTK) other than the fact that it relies on electromagnetism, rather than mechanics. Perhaps it would help for you to read the thread prior to posting in it?
If people are claiming that our phones send out a signal and communicate with the GPS satellites
That's not even remotely what this thread is about. Regicide may have misspoken slightly, but it's absolutely not worth putting any time into which device signals which, and when - the nature of the signal is what matters.