Despite not being the more dramatic iPhone 5 revamp, the iPhone 4S isn't doing too shabby. It may very well be Apple's best-selling smartphone and now pre-orders for the entry-level $199 iPhone 4S are reportedly sold out on all three partnering US carriers. Pre-orders for the iPhone 4S on the very first day were said to have passed the 1 million mark, breaking the previous iPhone 4 sales record of 600,000.
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