I got a mobile message ,whom i won 550,000pounds which is unbelievable to me from smswins @rediffmail.com...is that realy happen to me? anyway thanks.

I GOT A MOBILE MESSAGE WHOM I WON 550000POUNDS .which is unbelievable to me from smswins2rediffmail.com   is that really happened to me?anyway thanks.

No, it is a scam to get you to send them large checks out of your bank account (so they get access to your account information) for something they never send you. If they do send a check, it is counterfeit and the bank will try to process it and take the money out of your account. Any personal information you send them will be used to steal your identity.
If they keep calling you, pick up the phone and press the # key several times. I read that it causes their phones to crash. Hope I got to you in time before they did.