This is possibly the scam I recently heard about. Caller asks "Can you hear me.?". If you say "yes", they use your voice for confirmation of various purchases or bank transactions. This is one article : http://www.hometownlife.com/story/news/local/ ... ution/98158756/
Just got a call on my cel phone. I picked it up, but did not say anything. I am doing that with all unknown calls now. The calling number is from my home area code.