The first thing that you will notice about the iPhone 4S is just how familiar it looks. If you never turned it on, you would not see a single difference between it and its predecessor. Apple may have added three more megapixels to the iPhone’s camera, but that’s just about the least interesting, and certainly the least important part of the 4S camera upgrade.
The big news is threefold. Lens, sensor tech and processing hardware. The A5 system-on-a-chip in the iPhone 4S turns out to contain dedicated image-processing hardware. This is similar to the “processing engines” found in regular cameras, such as Nikon’s EXPEED and Canon’s DIGIC. This hardware makes the camera a lot faster. While we’ll have to wait to test it in real life, demos show that the camera performs at the speeds of a compact, not a phone. It snaps photos faster and gets them on-screen and ready to see a lot quicker. I Phone 4S also brings world phone capabilities. This means that each iPhone 4S sold has the hardware to handle both CDMA and GSM networks. So if you’re on a US CDMA network, and visit Europe, you can buy a pre-paid SIM card for a local GSM network, pop it in your iPhone, and avoid roaming fees.
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