i got this number on my cell phone offering a free i phone i called the comapny and they said to be careful with this ?

3 texts 5:45pm Feb. 27, 2012 from promodaygiveaway.com directing that I test "Free" to their site to a FREE iPhone4S !
Bogus, I did not reply, even before I saw other comments about this site.  IF they were to give everyone on earth a free iPhone4S - I would be ineligible due to contract requirement with Apple and AT&T.  I resent that they were able to obtain my new cell number - I have shared it with few people at this time.