THE LAST TIME WE SAW THE COMMS ON THE RING THEY STILL WORKED.
I REPEAT: THE LAST TIME WE SAW THE COMMS ON THE RING THEY STILL WORKED. THE HEADCANON THAT BELLAMY AND THE OTHERS COULD HEAR CLARKE FOR THE PAST SIX YEARS IS ACTUALLY POSSIBLE IF THE WRITERS DECIDED TO MAKE IT HAPPEN.
(The last time we saw them used was in 2x01 when Jaha was trying to contact the Arkadians on the ground. But the reason he couldn’t hear them because Mt. Weather was still actively jamming frequencies. We haven’t seen the comms on the Ark being used since before Mt. Weather went down but the point is that they still function.
I may or may not have rewatched this episode just to see if this was a possibility.)