This may have been brought to your attention before, but I thought I'd post it just in case it hadn't. I'm sure there's a few of these in the game.
Never the less, there's an un-collectable comms device for me inside the (secret) safe-house at H St NW x 4th St NW. It's on a chair, pictures related.
In the past, problems like this have generally been able to be solved by entering a friend (or someone else's) instance and collecting it there, but alas, this doesn't work for this one. It's permanently unobtainable for me throughout my whole game. After every patch I go back and see if it's possible to collect, and for the last three weeks I've had no luck.
It's a small thing, but I'm a completionist so it irks me more than it probably might most people.
Thanks for all your hard work. Awesome game!
EDIT: Ok. So I can't figure out how to embed pictures for whatever reason. Links are:
https://imgur.com/zARtj2f
https://imgur.com/3GXcoCm