A forum post from Vietnamese site Tinhte today posted a 64GB iPhone 4 model--with what it says is a new variant of the iPhone 4.
A series of images of which are claimed to be a prototype lower-cost iPhone 4 have been posted. The images are said to come from a "very reliable source" and are said to represent a lower-cost version of the iPhone 4.
The post describes an iPhone 4 but using plastic instead of glass to lower costs:
"Some other information that you want to transfer to you is that this machine seems to run faster than the iPhone 4, lighter weight and two glass front and back seem to have been replaced by two plastic sheets, type of sensation and cry other than the iPhone 4."
Numerous reports suggesting Apple has been working on an upgraded version of the iPhone 4 dubbed iPhone 4S instead of a brand new model go back to May. But, more recently the tide has shifted, with rumors suggesting the release will represent a new generation with a different design.
Some have suggested that the device is simply a regular jailbroken iPhone 4 with either matte protection films on the front and back or an early conversion kit utilizing plastic parts to turn black iPhone 4 units into white ones. While either of these explanations may be true, the original poster seems to believe that the device is genuine, and his track record of having obtained access to an iPhone 4 prototype ahead of the device's introduction as well as other prototype iOS devices adds weight to his claims.