Today I received a replacement iPhone 5 from the apple store and my new phone has a weird serial number that I never seen before. Usually it's MD##@@@@ blah blah. Where ## indicates the build week but mine starts out DNPJ@@@@@ with only one number in my serial number. Anyone have the same experience? Does this mean my phone is a refurbished phone? Can't be since the phones has barely been out for less than a week. Side note: exchanged my phone due to dust in my rear camera lens. My new phone is flawless by the way and battery life is way improved over the old 5 which was great too.