The thread is here, great radio, can't stop playing with it (had it a couple weeks now, one game of use):
Not having a radio is double edged, leaves you free to focus on playing the game, but makes you useless to the team overall unless you are with someone who has a radio. If you run with the group, no radio needed. If yo ugo off on your own or with a couple other guys with no radio, you won't be able to get info from your team to help you help them for objectives/reinforcement. I've gone both ways, radio and no radio, and I prefer having a radio. Helps to know when game is over too, or an objective has been captured.