The Galaxy S IV features an Exynos Octa 5410 CPU clocked at 1.8GHz, PowerVR SGX 544MP GPU, 2GB of RAM, 4.99″ Full HD (1920×1080) display and a 13 Megapixel Camera. The device also runs Android 4.2 out of the box. The Galaxy S IV retains the menu, back and home buttons, like its predecessors.
The device supports GSM/WCDMA/LTE networks with an Exynos processor on-board meaning its called the GT-I9500 and only therefore one variant. The Galaxy S IV will be a world phone.
And it appears it still will be made of plastic. I really hope not!