There are reports that Sammobile has got hold of specifications and sketch of a device from trusted sources at Samsung which has been taken from Service Manual for GT-I9300, which is probably Galaxy S III.
According to the manual, Samsung Galaxy S III will have a home button, Super Amoled screen of size 4.8?, a processor clocked at 1.5 GHz which is surprising as Samsung has announced 1.4 GHz Exynos 4 Quad processor. Specification shows a camera 8 MP and not 12 MP.
There is however, no any confirmation as to whether GT-I9300 is Samsung Galaxy S III or not.
Stay tuned for more updates on Samsung Galaxy S III!