Calling Overseas on Wi-Fi

Walt Mossberg answers a reader’s question about using Wi-Fi to make international calls.

Tablet Buyer’s Wi-Fi Goof

Walt answers a question from a reader who unintentionally bought a Wi-Fi-only tablet: Can it be activated for 4G cellular service?

Smartphone With Wi-Fi Smarts

Republic Wireless is offering a clever, modern service on a good smartphone, and is showing that Wi-Fi calls can be as good as cellular ones.
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Wi-Fi(delity) in a Smaller Sonos

Sonos has come out with a lower-priced, smaller model that preserves its quality sound and its modular, wireless connection system.
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Speed and Power Packed Into a Thin iPad Air

This new iPad isn’t a radical rethinking of what a tablet can be, but it’s a major improvement on a successful product, says Walt. And it’s the best tablet he’s ever reviewed.
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New Roamio: TiVo on the Go

Walt reviews Roamio, a new version of TiVo that lets users watch TV content anywhere there’s Wi-Fi.
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Review of Google’s New Chromecast

Walt puts Google’s Chromecast device, a rival to Apple TV, to the test.
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Getting a Charge in Europe

Are there devices that are compatible with the European electrical system?

Limiting Wi-Fi Access Per Child

Walt answers readers’ questions about limiting Wi-Fi Internet access for family members.

For $19, an Unlimited Phone Plan, Some Flaws

Walt Mossberg tests an Android smartphone from an upstart carrier that charges just $19 a month for unlimited data, voice and texts — with no contract.
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Sizing Up the New iPad Mini

4G or Not 4G: A Guide to Cut Through All the “Fast” Talk

Need Mobile Email? You’ll Need a Data Plan.

For iPad and Mobile Devices, a ‘Port’ out of the Norm

Delete a Facebook Account

The Satellite: Extra Storage for Tablets on the Go

TouchPad Needs More Apps, Reboot To Rival iPad

A New Tablet From Acer Challenges iPad on Price

Camera Has an Eye for Photos, Brain for Wi-Fi

Movable Internet Service

Verizon’s ThunderBolt Moves Like Lightning

In and Out Of Office: Putting iPads To Work

iPad 2: Thin, Not Picture Perfect

Atrix 4G: Faux Laptop With a Phone For Brains

The Streak 7: Bargain Tablet From Dell Is No Real Deal