In the video above, Chinese parts supplier ETradeSupply looks to have gotten their hands on what appears to be the back half of the unibody casing of the upcoming iPhone 5. Side-by-side with the iPhone 4S, it suggests that newer model has a bigger screen measuring about 4 inches, which would confirm previous reports. Also, the headphones port has been moved to the bottom of the device, which is sure to get some complaints. The dock connector looks to have been downsized, as a sacrifice for bigger speakers. We’ll know for sure if it everything checks out next week at Apple’s WWDC.