Apple iPhone 5

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Apple iPhone 5

This is an obvious one, right? The iPhone 5 is the most successful smartphone on store shelves now, and considering Apple won't replace it for the next six months, it'll rack up millions of sales before it's replaced by the iPhone 5S.

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Apple iPhone 5S

Speaking of the iPhone 5S, that device will likely carry the torch that is passed by its predecessor. The iPhone 5S is reportedly going to come with an improved processor, a better camera and the same design as the iPhone 5. But since it'll likely launch in the middle of 2013, it'll have ample time to score some huge sales.

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Apple iPhone 4S

When evaluating iPhone sales, it's important to not forget about the iPhone 4S. That device might be last year's model, but it's still selling exceedingly well because it's cheap—customers can buy it for $99 with a two-year contract. Plus, it's not such a step back from the iPhone 5 that customers wouldn't want it. The iPhone 4S is a successful product for Apple.

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Samsung Galaxy S III

The Samsung Galaxy S III truly put Samsung on the mobile map. The device has sold tens of millions of units around the world. Even though it's being replaced by the Galaxy S 4, analysts expect the earlier model to continue to sell well through 2013 as its price comes down.

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Samsung Galaxy S 4

The Samsung Galaxy S 4 is easily the best new smartphone that we know about right now. The device comes with a 5-inch screen, a 13-megapixel camera, and a touch-free software feature that's unmatched in the mobile marketplace. The Galaxy S 4 is the device all customers will want. And who could blame them?

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BlackBerry Z10

The BlackBerry Z10 might seem like an odd choice, considering the company it's coming from, but the device has already attracted strong sales in Europe. Even in the U.S., the Z10 isn't expected to be a slouch. BlackBerry's handset won't reach iPhone-like sales, but it'll be a respectable contender through 2013 and might even succeed in turning around BlackBerry's fortunes.

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LG Optimus G

The LG Optimus G is arguably the best product the company has announced thus far. It has a big screen, a powerful processor and could very well be a nice option for those who don't want to get caught up in the war between Apple and Samsung. Plus, the Optimus G is really, really good-looking, which should help.

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Nokia Lumia 920

The Nokia Lumia 920 is not for the faint of heart. The device is running an operating system in Windows Phone 8 that has yet to fully take off, and Nokia's future is decidedly in doubt. However, it's the best Windows Phone model on the market, giving it a strong chance of leading sales in that sector of the market.

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Although HTC has experienced its fair share of troubles, the Droid DNA is actually a really great product. The device is HTC's first 5-inch-equipped device and has a full 1080p high-definition display. The Droid DNA is perhaps HTC's best answer to the Galaxy S 4. But whether it'll hit the sales of its chief competitor remains to be seen.

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Samsung Galaxy Note 5

The Samsung Galaxy Note 5 Phablet is the kind of device that confuses customers, since it can't quite decide if it's a smartphone or tablet. But it's truly a great product that deserves to be one of the top-selling products on the market. With a stylus, big screen and high-end processor, it's a true competitor for mobile dominance.

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