I've got the same sms too, it is coming every hours or 2 for 2 days continously, It sure is a scam, but how to stop this SMS completely.

If your phone runs apps, go to your app market and search for an SMS blocker. There should be several free ones to choose from. You can also contact your service provider and ask them to block premium SMS and incoming international calls.

Oh! How I wished it were true!
REF NO. SE-2E
YOUR CELL NO WON £1,500.000 GBP IN THE ONGOING UK SONYERICKSSSON 2012 AWARDS.
FOR CLAIMS. Its from this UK no : +49 151 26897949 Please note!
Observe the punctuation errors on the now,1,500.000! What is it now? millions or thousands! either way, its a hoax!

Rec'd this sms on 26Feb@01:20:52hrs                   from: +49 151 2689 7949

REF NO SE T2
YPUR CELL NO. WON  £1, 500. 000 GBP IN THE ONGOING UK-SONYERICSSON 2012 AWARDS. FOR CLAIMS EMAIL: sonyericsson-inc@live.co.uk

its a hoax!

I also received the same SMS in Greece, on Feb 28 2012, 5:10am, from +97455266817.

REF NO. SE-T2 YOU CELL NO.WON # 1,500.000 GBP IN THE ONGOING UK-SONYERICSSON 2012 AWARDS. FOR CLAIMS EMAIL: sonyericsson-inc@live.co.uk

I'm just happy I keep my mobile off during night...
Will those scumbags ever get a life?