Shutting down cell service has been done twice already. Involved an incident on the subway, probably NY.
You say, Shutting down the Internet/cell service and the majority of the military would smell a rat. Yes, and so what. Would the military stage a coup? No.
Would they follow orders? Being suspicious means nothing. After My Lai, the army doctrine was, you can disobey a lawful or direct order, if you believe it to be illegal, or a violation of your religious or moral beliefs. What happens? You go to the brig and held until an inquiry. In the real world,do you think really, the military would en mass stack arms because they are suspicious?
More than 50% of Americans are screaming right now.