INFORMATION:-
The iPhone 4S is a gradual step over the iPhone 4 improving the internals, but
keeping the look and feel. At the same time, though, it brings a reworked iOS
5 and introduces Siri, a personal voice assistant allowing you to vocally communicate
with the iPhone. It comes with a 3.5" screen with a resolution of 640 x 960 pixels, but
on the inside there's a twice more powerful dual-core A5 processor. It also improves
connectivity a notch, bringing 14.4Mbps HSPA download speeds.