Who called from 2348171697046

i received txt saying i won $780,000.00 from ur company

your cell number won780,000 bound

This morning I receive a message and told me that my bb pin number won 780,000pounds.   Ref no.BB12 for more info Email [email protected].     How true it is??????????And the number who sent a message are this'.......+2348181564934

I got a text from this number saying i won 780,000 pounds . ref no : BB12 and telling me to find more info by contacting them at [email protected]

These are all scam mails and sms, but I am wondering how they get our mobile numbers?  These scammers have even invaded the Dubizzle website...don't get caught, don't even send $5.