Me too got same one telling me to go to bestbuy site which turns out to be an auction site - funny thing is I made a purchase at bestbuy last week and they took my number - could it be that best buy is related to this?
I don't think I have ever shopped at Best Buy and I just received a text from 212-920-4704 saying I won a prize with the message, "Congratulations, your number made you BestBuy's winner of the day! Goto http://www.bestbuy.ca.wonacontest.com to claim yoour prize! You have 24 hours to claim." *note - all spellings mistakes are exactly how they came up on my cell.
Here too and this is a brand new phone as of May 31st...no one but friend or family have the number and I havent bought anything from Best Buy since I purchased this phone.