Genuine white iPhone 4 handsets are reportedly selling on the Chinese gray market, according to a recent post by TUAW. As you can see from the above and below images (courtesy of Giz-China), the handsets appear to be real, unlike the “custom white” iPhone 4 units that have recently been selling on eBay.

Currently, the handsets are selling for around $899. The boxes themselves are marked with a label which reads: “for internal use only,” as you can see below:

It hasn’t yet been confirmed whether these handsets are entirely genuine. But, as you can see from the above images, they certainly appear to be, whether Apple will admit it or not.

We’ll keep you posted.