If you've been holding your breath waiting for HTC's newest warrior in the smart-phone wars, you can exhale: The HTC One is now available both online and in stores as of today.

The sleek BlackBerry Z10, one of the newest additions to our smart phone Ratings, is the first phone to run on the radically redesigned BlackBerry operating system. Taking a fresh, innovative approach to BlackBerry's renowned messaging capabilities, the Z10 demonstrated it has the chops to take on other top-tier entries like iPhone, Samsung Galaxies, and several Android and Windows Phone models from HTC.

The aptly named HTC First is the first smart phone optimized for Facebook Home, the social-network giant's new interface for Android phones. I've spent a little time with the app and the phone, and found the phone overpriced ($100 from AT&T with a two-year contract) and the app overbearing.

In the battle for smart-phone supremacy, the highly anticipated HTC One appears to be the Taiwanese manufacturer's best warrior yet. While we haven't yet fully tested the HTC One, which hits the market next week, the press sample of the phone I've been using for several days has been very impressive.

At a recent Green Day concert, my daughter and her friend both took pictures of the band with their smart phones. We were sitting pretty far from the stage, so they had to zoom in to compose and capture their photos. Since they were shooting with smart phones, they had to use digital zoom—which will almost always result in photos or video with degraded image quality.

Samsung has announced it will set up dedicated mobile shops within Best Buy stores to sell its cell phones, tablets, laptops, and cameras. The Samsung Experience Shops, coming to more than 1,400 Best Buy and Best Buy Mobile stores beginning this month, aim to bring Samsung customers the same expert, brand-immersive experience that iPhone, iPad, and Mac types enjoy when they visit an Apple Store.

Facebook today announced something a tad more humble than the rumored phone or operating system: Facebook Home, an enhancement for Android phones. Available as a free download from the Google Play app store in about a week, Facebook Home turns the popular social-network app into an interface, situating itself between you and Google's Android operating system.

Next time you're at the mall and have trouble finding the restroom, a place to nosh, or a certain electronics retailer—one where you might pick up an iPhone, iPad, or MacBook—your Android phone can show you the way. A little-used feature of Google Maps is its maps and interactive tours of the interiors of many shopping malls, retail stores, airports, museums, libraries, convention centers, and more.

It's amazing what you can find out from an auto show. This year, in the course of covering the New York International Auto Show, we came across some exciting electronics news: Readers no longer need commit to a book format the whole time they're reading, even when behind the wheel.

Want to improve the high-quality photos and videos you've taken on your phone? Chances are your smart phone has video-editing tools built right in that can help you craft a polished video that's easily shared.

What do you do with your photos after you capture them on your smart phone? Beyond posting them on Facebook or Instagram, or texting them to your friends and family, you may want to print some choice shots or use them in slideshows. Here are three steps to help you get more from your smart-phone photos:

T-Mobile is ending contracts and slashing prices for both service and phones, a refreshing change from the complex plans and high costs that irritate many phone users. That could save a T-Mobile customer several hundred dollars over a two-year period compared to plans from AT&T and Verizon.

The Samsung Galaxy S 4 will be loaded with cool features—but I predict that some of the coolest will trickle down to the older S III, which is currently one of the most highly-rated smart phones in our Ratings. And currently, the S III costs just $100, while you can expect the contract-subsidized Galaxy S 4 to cost $200 to $300 when it hits the market in a few months.

Consumerist (our sister site) just ran a story about a couple of hapless parents, a five-year-old Littlest Pet Shop player, and a $120 charge the child incurred making in-app purchases for the game. If you're concerned about the same thing happening to you, here's how you can prevent it.

The just-announced Samsung Galaxy S 4 is loaded with smart, innovative capabilities: so many, in fact, that we didn't cover them all in our first look of the S 4. Nevertheless, no other phone we've seen has as many compelling features as this new Galaxy smart phone. Here are a few more, some of them Samsung exclusives, that we can't wait to take for a spin: