Some one keeps calling me from 920 149 6135 and its geeting anoying cuz noone answers and I call back phone # not on service how do I stop this calls...

Just like many other numbers, being used for this same scam.  They are relentless, keep calling and insisting that I won a free ipad.  Ya right!  Don't go to their website, don't enter the verification code, don't waste your time.  All they're trying to fish for is personal info.  I didn't buy into it, neither should you.  Who gives stuff away, with no strings attached?  Only real companies, with legitimate phone numbers and actual contests you yourself sign up for.