The Nokia Lumia 900 represents a number of firsts: it is the first high-end Windows Phone from Nokia to arrive in the U.S., it is the first 4G LTE smartphone from Nokia, and it is one of the first 4G LTE Windows Phones on the market.

Like the Lumia 800 that preceded it, the Lumia 900 features stunning industrial design, great build quality, and a fantastic ClearBlack AMOLED display. Add in great network performance, solid battery life, and a fast and fluid user interface thanks to Windows Phone 7.5, and you start to see that Nokia really might have a winner on their hands.

The smartphone market is heating up once again as Microsoft and Nokia finally have a hero device out to push the Windows Phone platform, and it's priced quite competitively to boot. Also a handful of Android devices announced back in CES and MWC are finally seeing the light of day.

Check out our selection of the hottest devices currently out there (or soon to be released). Each phone is listed alongside its feature highlights, specs and prices, from newest to oldest. To further aid you in making well-informed decisions on your next purchase, we've also included metascores from our Product Finder.

When we launched TechSpot's mobile site (m.techspot.com) ten months ago our goal was to mirror the experience and many of the features we offer on the main site. I'm glad to share today the response has been overwhelming. The site's usage has grown exponentially in such short timespan, and this past December we received a record 230,000 visitors!

The Lumia 710 represents Nokia's first Windows Phone 7.5 smartphone in the U.S. Thanks to a fast processor and Windows Phone's attractive and snappy interface, the Lumia 710 is no slouch when you use it, and the phone benefits from solid call quality, decent battery life, and a usable camera.

But is the Lumia 710 capable of making a splash in the crowded U.S. smartphone market, or if it just another forgettable, entry-level device?

The Samsung Focus S is one of the two new Windows Phone 7.5 smartphones for AT&T that succeed last year's Focus that was build around WP7.

Where the original Focus had a strong familiar resemblance to the Samsung Galaxy S running Android, the Focus S is as close to a Windows Phone 7.5 version of the Galaxy S II as one can get.

One of the problems we've seen with Windows Phone devices thus far is that if you've seen one Windows Phone, you've basically seen them all. Or so we thought...

Nokia has proven to the industry that it can do Windows Phone better than the competition. Its Lumia 800 features one of the best hardware designs found on a smartphone today -- on any platform. In short, it's a fantastic smartphone that truly takes Windows Phone to the next level.