The Apprentice wrote:80s electronics sometimes have gigantic capacitors in them even if it seems like it wouldn't make sense for them to be there. This allows them to hold charges like they have a battery for a few hours after being unplugged. Like someone mentioned earlier, the radio could easily continue making noise while unplugged for a while.
If you don't believe me about the capacitor thing and you have an NES currently set up somewhere, go unplug the thing, turn on your TV, and hit the power button. You'll get about 1 second of power followed by another second of static. Granted that's only two seconds, but I'd imagine it takes only a really small amount of power to cause the speaker of a radio to work.
In fact, sometimes radio interference causes me to hear radio chatter through my computer speakers.
And that's my one post for this year, everyone.
That is the most likely explanation, and what I expected the reason to be after hearing the radio chatter, but before that it had all been a series of rings, unexpectedly not coming from the phone.... and with everything being unplugged my first thoughts were not rational ones.