BLOCK THIS NUMBER!!!
It's nothing more than spam.
April 2015 I wrote an entry about this after I blocked the number.
Since I have looked at the calls I receive each month and noticed that these people continue making calls on nearly a daily basis all of which are blocked.
caller ID "3149638895" which is pretty annoying since my caller id calls out all the numbers, then of course there is no message. This is definitely a scammer