I also received a call (but no message) on my cell from this number, and I also had carpet installed by Empire last week.
Yes, the installation was fine!
If anyone has recently used Empire Carpet, that number is a call from Egypt that is a follow up survey. Check out this link from the apple forum. I've been getting the same annoying call as well
http://discussions.apple.com/thread.jspa?threadID=2054875
I too just used Empire Carpet and coincidentally just got a hang up call on my cell phone from +20 15209296. I have received 6 additional hang-up calls on my home phone today. How they got my home phone number I don't know. I am going to call Empire Carpet and start complaining.