Just throwing out a little more info, don’t even know if it has relevance.
Cell phones were originally analog. The switch over to digital was very gradual. Digital signals allow for much greater distance to be covered on much less power (thus miniaturization of phones) because of the nature of square (digital) waves. Much more effective at filtering noise and interference.
This inherently means that the phones of today are going to be square wave signals and very low power. If that alone were enough, Q would not exist. They would simply shut him (them) and/or us down. So they may act as a trigger but are not enough by themselves to completely program a human. And Parkland would suggest that you really need somebody who is largely predisposed toward moving in the desired direction to begin with. You can’t just flip a switch and a born pacifist suddenly becomes Rambo. Talk to me, Johnny!