The video was uploaded to YouTube by an anonymous user.
A larger 4-inch screen and a new dock connector are presented in the clip.
But the ‘connect to iTunes’ messages keep appearing on the screen.
The Daily Mail writes that this could be an indicator that the user may not have a cable or fears being tracked by Apple if he connects it to a PC to activate it.
This is the latest in a series of leaks on the anticipated handset.
Recently, a Taiwanese pop star posted photos of what he claims to be the new iPhone 5 on Weibo.