The Radio Snake communicates with his allies via a field radio. The radio will allow him to dial into specific frequencies to contact certain people. When a person is reached a picture of them will pop up on screen and Snake and the character will converse. The radio can be used to find things out about certain characters, plants, animals, survival techniques and so on. It is pretty much an information database at your fingertips. Different frequencies will contact different people so make sure you are on the right frequency before transmitting. It is not, however, necessary to memorize all the frequencies by yourself. There is a small options screen below the main interface where you can select a previously used frequency so that you don't have to remember it or constantly dial it in. There are also some special fequencies in the game that will open various doors or do other things for you. Some might cancel an alert mode, some might play some elevator music. ----------------- Radio Frequencies ----------------- -- Virtuous Mission -- Major Tom - 140.85 Para-Medic - 145.73 The Boss - 141.80 SAVE - 141.96 -- Operation Snake Eater -- Major Tom - 140.85 Para-Medic - 145.73 Sigint - 148.41 Eva - 142.52 SAVE - 141.96 -- Special Frequencies -- Cancel alert (works once) - 144.87 - 144.40 - 141.45 - 141.53 - 141.98 - 142.79 - 144.61 - 146.67 - 148.04 Fire Support Request - 143.98 - 140.09 - 141.31 - 145.68 - 146.74 - 147.32 - 148.56 - 149.29 Don't Be Afraid / Rika Muranka - 141.85 Don't Be Afraid / Rika Muranka - 149.53 Jumpin' Johnny - 144.06 Jumpin' Johnny - 147.96 Jumpin' Johnny / Chunk Raspberry - 144.86 Pillow Talk / Starry K. - 148.96 Rock Me Baby / 66 Boys - 146.65 Surf Music - 148.39 Sailor - 147.59 Salty Catfish - 140.01 Rock Me Baby - 140.52 Sea Breeze - 141.24 Pillow Talk - 142.94 * Kudos to sz agent for the Cancel Alert and Fire Support frequencies. When you are talking to someone over the radio you will be able to see a few different pictures of them as well as a small dossier. Just use the d-pad to scroll through all of this and find what you are looking for. Note that you can only do this while talking to the person not at any other time.