"Your mobile number has won new Iphone 6S from Apple!
Follow this link and download: http://goo.gl/EodyA2
After that write your address and we will send you IPhone 6S."
I followed the link and direct me to download the NAMSHI apps from AppStore and then when I tried to reply to to write my address a pop up message said this "This contact no longer viber installed. Send regular SMS message instead? Then I hit yes and this number appeared.