There are several leaks of the upcoming flagship from Samsung that have surfaced over the last couple of days, and today, just hours before the launch event for the Galaxy S IV (http://www.gsmarena.com/samsung_i9500_galaxy_s_iv-5125.php), we see yet another one pop up. This time it is a Dual SIM device, and is by several accounts a prototype, meaning that the final build might not look like the device pictured.
Otherwise, the specs sheet is largely the same as what we suspect will be in the Galaxy S IV: