Mobile World Congress

Samsung's Galaxy Note 8 finally has a price tag and a release date. The white tablet, which was unveiled at the Mobile World Congress earlier this year, will be available at big-box retailers nationwide for $400 on April 11.

The Galaxy Note 8 joins the crowded handheld multimedia tablet space, alongside the iPad Mini, Nexus 7, Kindle Fire HD, Nook HD, and others. We've already seen how the top four seven- to eight-inch tablets stack up against each other, but what about the newest device on the block? How does Samsung's newest Note compare to the bestselling iPad Mini?

At $400, Samsung's Galaxy Note 8 is a bit more expensive than Apple's handheld tablet ($329 for 16GB) — but not by much. So we compared the new Galaxy Note to the iPad Mini in four other major categories: size, display, memory, and camera.

See how Samsung's new Note fared after the break.

Clear room in your digital life for the latest tablet, the 10.1-inch HD Sony Xperia Tablet Z. Released today at Mobile World Congress in Barcelona, the company says this tablet is the thinnest of all other 10-inch tablets currently on the market at 6.9mm.

Sony hopes the Xperia, operating on Android 4.1 Jelly Bean, will become the center of your living room, controlling TV watching with the Side View app, which functions as an interactive programming guide while also controlling something as simple as changing the channels of a Sony or most other manufacturers' television displays. The slim tablet's features also include:

• Front-facing 2MP camera and rear 8MP HD camera.
• NFC technology.
• Water resistance in up to three feet of water.
• Two-speaker surround sound.

The Xperia Tablet Z will come in a 16GB model ($499, black) or 32GB model ($599, black and white) and be available to consumers sometime in Spring 2013.

Mozilla, maker of the nonprofit Firefox web browser, is taking on iOS and Android with its own mobile operating system, Firefox OS. The company showed off the first commercial build of the Firefox OS at 2013 Mobile World Congress in Barcelona, Spain, and announced that the new "open web" OS will make phones for low-income markets more accessible than ever.

Mozilla's operating system is built on a brand new concept — the Firefox OS is based entirely on Open Web standards, and apps for the operating system are developed as an HTML5 application. Unlike iOS and Android development, mobile software engineers won't need to learn a new coding system for Firefox OS. They will be able to write apps in HTML5, opening up the system to more developers.

Think of Firefox OS apps as mobile-optimized websites that you would bookmark on the home screen of your iPhone. Instead of "native apps," like the kind you download from Google Play or the Apple App Store, Firefox OS apps are based on the web.

This affords developers the ultimate flexibility to design an interface uniquely suited for their customer base. Firefox OS phones will initially roll out to markets in Brazil, Colombia, Hungary, Mexico, Montenegro, Poland, Serbia, Spain, and Venezuela. Phone makers LG, Huawei, Alcatel One Touch, and ZTE are already planning on releasing devices with the new Firefox OS ecosystem.

Mozilla's new mobile ecosystem, which is positioned to make smartphones more accessible and affordable, may be a game changer for international markets. How do you think the nonprofit company will affect the mobile phone market?

If two screens are better than one, the Sony Tablet P will be your go-to tablet. Announced earlier today at this year's Mobile World Congress, the dual-screened Sony Tablet P will go on sale March 4 for $400 exclusively through AT&T. Previously known as the S2, the Tablet P comes with two 5.5-inch displays that can be used together or for separate functions, like using the top half to read your emails while using the bottom as a keyboard.

There are some pros and cons to the unique design of the Tablet P. Unlike other tablets, the Tablet P can be folded in half to make it incredibly portable, slipping into the smallest of handbags or clutches. The downside might be the apps. The Tablet P will launch with a number of apps optimized for the dual-screen view, but there's no telling just yet how it will perform with the wide range of apps available in the Android Marketplace. Other key specs include 4G LTE speeds, two cameras (5MP rear-facing, 0.3MP forward-facing), 4GB of on-board storage (expandable up to 32GB), 1GB of RAM, and up to seven hours of battery life, all packed into a body that weighs just under a pound.

As expected, a two-year contract is required for the $400 price tag. Data plans will set you back $35 a month for 3GB, and $50 for 5GB, unless you choose to prepay for your data every month, which will get you a $5 discount on 3GB and an option for 250MB for $15.

What do you think of the Sony Tablet P? Will you be buying?