Theres a very good reason why the IG go low-tech with communications aside from environmental, resources and technical reasons- signals intelligence.
You only give comm gear to specialists, because they're trained to scuttle it in the event that the gear is or might be captured, in the event every Joe Guard is running around with a bug in his ear, all it takes is just one of them to fall into the wrong hands by any means and that's it, your whole communications system is wide open and you will be completely boned.
Admiral Yamamoto, flying along quite happily- got blown up by P38's because they got through the low level encrypt on his movements. Battle of Midway, JN-25 was cracked by the allies and the Japanese failed to roll out a new codebook- 4 to 1 losses to their fleet which they never recovered from. Capture of U-559, most of the crypto & its enigma machine captured, massive amount of bombe machines where made to crack German codes for the rest of the war as the possibility of it being cracked was the 'least of all security problems'
Look at how Osama bin Laden went low tech for years sending out messages, he used couriers with a USB stick that wandered into internet cafes or to other cells and while it was known he used them, they where next to impossible to intercept due to the 'physical' aspect of someone just delivering it manually. I worked for 5 years in a technical role 'finding' (mostly f**king horrible) people with signal intercepts and traces, 5 years on, still write the application architecture, ops proceedures and deliver projects in that scope from time to time when new technology comes in. If theres one thing to be learned from that is that you mostly catch the 'smart' ones when they screw up and the dumber ones never figure out just how wide open they are, all the time.