In the past two days alone, I've gotten over 20 spam calls with none of them leaving a message. Just 3/4 seconds of silence on my voice mail. One call the other day left a 22 second blank message.
I've also been getting random number calls, and it's always a robot telling in my native language: "Finaly, I have found you..." and I never get to hear the rest, I just hang up, I have better things to do than listen to spam. The annoying part is that i have to answer, i get important calls from unknown numbers from time to time.
Edit: is anyone else getting this kind of calls in the EU?