its these automated calls mainly or only to cell phones that use your minutes to profit somehow. they usually want either for you to enter with them for a fee so they can tell you who "they" think will win upcoming football games. if you press the number they ask you to press to remove you from their list, it only verifies its a valid cell number that they contacted and they keep trying over and over- while wasting the minutes from your cell. They wouldn't be doing this if they weren't making profit, somehow even a possible "conspiracy" between cell phone companies and their useless-[***] offers. if you have continuous trouble from them, call the fcc and report this "suspicious activity".
it rings long enough to get the number on my screen, never leaves a message, I never answer it either as I have NO idea who/what it is.....area code is from California....