I had my iPhone 5 swapped out under warranty today. I don't care one bit if the replacement is "new" or refurbished, but I noticed the new Serial number began with DNPK, and the OS is 6.1.4. Plugging the serial into the chipmunk.nl decoder, production year is said to be May 2013. I wonder if Apple is beginning to use more new phones as replacements. I read that it is more cost effective, although I'm not sure that's the case. Just thought it was interesting. If it matters, it's a 32GB Sprint model.