Walt weighs in on the smartphone wars. Who will dominate this new handheld platform, and who will attract the most users and third-party apps?

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Walt gives his first impressions of the new BlackBerry App World. The store has hundreds of apps available at launch, and RIM says it expects around a thousand to be available in its first week. Like Apple’s store, RIM’s offers both free and paid apps that download directly to your device.

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Walt Mossberg and Katie Boehret were at the GSMA Mobile World Congress in Barcelona this week, and sent back this report on some of the highlights of the show.

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On Fox Business News today, Walt discusses how the new BlackBerry Storm phone measures up to the Apple iPhone and the Google G1.

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Suppose you own a Dell computer, and you decide to replace it with a Sony. You don’t have to get the permission of your Internet service provider to do so, or even tell the provider about it. You can just pack up the old machine and set up the new one. Now, suppose your new computer came with a particular Web browser or online music service, but you’d prefer a different one. You can just download and install the new software, and uninstall the old one. You can sign up for a new music service and cancel the old one. And, once again, you don’t need to even notify your Internet provider, let alone seek its permission.

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