Theory: The Pluribus hivemind works on HF Waves, Ham Radio low frequency waves

Episode four of Pluribus just aired, and I believe it revealed to us how the hivemind functions.

The ep starts off with Manousos from Paraguay using Ham radio to surf low frequency waves (HF), and then he writes down the frequencies that are empty. (HF stands for "high frequency" but these waves are actually considered low frequency compared to the stuff utilized these days, so don't worry about the acronym's meaning too much)

At first it seems normal to assume that Manousos is searching the waves for non-hivemind individuals like Carol, after all HF waves travel the entire planet at light speed. Using a ham radio he could to talk to anyone in the world.

During Manousos's part of the episode, long lingering shots focus on a metal fence between him and the hivemind member's meal, remember this.

Cut to Carol's part of the episode, she is asking Pluribus-through the individual Zosia- if the hivemind has figured out how it itself functions.

The hivemind replies yes, but does not inform her of the mechanism. It is through this conversation that it's implied there is a way to reverse the virus's control on the individuals.

The episode reminds us again of radio communication during Carol's cop car escapades. Most cops have switched from HF to VHF waves, but the hivemind is sure to remind Carol of the show Adam-12, a cop show from 1968 that features cops using HF frequencies on its promo material

Cut to the end of the episode, Carol momentarily disconnects Zosia from the hivemind, Zosia experiences cardiac arrest. The episode spent a long time dedicated to Carol using herself as a lab rat, building a knowledge on how to properly dose another woman of a similar stature. It was not an overdose that gave Zosia a heart attack, it was the way Zosia was forcibly disconnected from the hivemind via drugging.

Carol's drug plan is a failure that can kill individuals, if only there was another way to free Zosia…

Good thing HF wavelengths are large, larger than the waves your microwave's metal cage with visible holes blocks out. The metal fence that the lingering camera shots used as a metaphor for Manousos's disconnect from the hivemind's world could easily block out HF waves. That fence metaphor had a double meaning and Manousos knows it. He wasn't looking for survivors on the radio, he was looking for the hivemind's communication frequency.

The way Carol will safely disconnect Zosia from the hivemind will be using a metal cage, akin to the fence the show focused on.

EDIT, even more evidence: On my original post post of this that got taken down (not this sub), u/Medically_Comatose pointed out that the opening of the show is an animation of a propagating wave! (it also seems to have a central source… perhaps there is one human weakpoint that is the most important Individual?)

Additionally, u/Frompadompus pointed out that the hivemind immediately took out the cellular towers, which would have been annoying to the hivemind (cellular towers use higher frequency waves than HF).

The hivemind waited days before cutting non-essential energy wastes like power from houses, yet they immediately took out cellular and then never offered to being back cellular for Carol, whereas normally the hivemind wants to do whatever is in its power to please her.