A new video has surfaced on a Vietnamese site, tinhte.vn, which is claiming to show a white iPhone 4 running an early build of the iOS 5 operating system (via Engadget). The video shows a white iPhone that is similar in design to the current iPhone 4, but running a version of iOS that is noticably different from the current version. In addition, the device itself shows small changes in design from the current iPhone 4.
There is no way of verifying the authenticity of this video and it could very well be a fake but given the gravity of what it shows, it certainly looks like a genuine Apple prototype leak. The XXGB on the rear of the device suggests that it is not a production model, rather a prototype that has somehow gotten out of the Apple campus. However, this could simply be a black iPhone 4 with a white case replacement installed running a jailbroken version of iOS 4 with a customer User Interface installed.
The new UI appears to show snapshots of open app windows in for multitasking, rather than the app icon as it does now. Additionally, the site is showing pictures that suggest the storage capacity of the new device is 64GB. Could this be the killer way in which Apple will encourage sales of a white iPhone 4 this late in the release cycle?
However, in the absence of any iOS 5 details released from Apple, you have to make your own call on the veracity of the video.
Update: It is now being suggested that this is a white iPhone 4, not an iPhone 5, but another video spotted by 9to5Mac provides more detail on the features of the iOS that is shown running on the device which may or may not be an early test build of iOS 4.