Op here, we're pretty sure its the Galaxy S IV. The model number, which is what we use to identify it, is the SGH-M919 and all other specs e.g. the screen reso

Op here, we're pretty sure its the Galaxy S IV. The model number, which is what we use to identify it, is the SGH-M919 and all other specs e.g. the screen resolution match up to the S IV, rather than the S III. The other comment on it being an engineering device and the chipset for commercial launch is a fair point though.