The same thing happens at Trump rallies.
I think the USSS has an ability to block cell phone transmissions for whatever period of time they deem necessary, and now that P. Trump is not in office, the period of time that the USSS blocks cell phone service during his rallies may be reduced somewhat...
P. Trump stated that the number of attendees at the Florence, AZ, rally was 73,000, and as one of those attendees, I can report that the cell service was definitely degraded to the point that I gave up trying to send out text.
I can also report that there was a forklift with a pallet on its forks that had the boom raised up to its maximum height and on the pallet were a spherical orb that appeared to be some kind of transmitting device and some other electronic equipment supporting it and cables or cords running down to the ground to its own power unit. It was tended to by at least two individuals with a supporting vehicle.
It might have been boosting cell service or blocking it, or aiding in recording cell phone numbers like a “Stingray”?
So much that is happening by our elites is frightening.