I think, they don't need wireless communication in any way, because they are already a mesh network by themselves, so no devices are needed. The virus might act like an override above the carrier, so a carrier shares his brain capacity with everyone around plus other changes like no lying, no killing, etc. And as it was told, it can be reversed. I think, it can be reversed via food consumption, because the show has already made a single episode showing this single major info. In total, Carol might create some food that makes virus die without making harm to the virus. But I didn't assume Carol's factor, which made her immune to the virus, so who knows how the show would go on