BGR reports that the iPhone 5, in contrast to earlier reports, may not have entered the final production phase in China just yet. The report, citing a trusted source, claims that the iPhone 5 has not yet entered the DVT (device verification test) stage of production. As such, the final version of what the iPhone 5 will be is not yet set in stone.
It’s certainly possible Apple is producing engineering samples of new iPhones and has started manufacturing device enclosures to iron out any problems with the manufacturing line before real production starts, but that’s all that is happening at this point in time. The final version of Apple’s next iPhone — the one that you will buy — has not started production yet.
Additionally, we have confirmation that the units Apple is currently testing have 1GB of RAM, doubled from the iPhone 4S’s 512MB, and integrated 4G LTE radios. We can also confirm that NFC hardware is present in the phones as well.