Mark SullivanSenior Editor, PCWorld

Mark has been writing about networks - social and wireless - since 2005. Independent and outgoing, he enjoys travelling, wine, and skiing. His favorite book is "Atlas Shrugged" by Ayn Rand.

Famous Facebook Flip-Flops

The social networking goliath has made a number of hasty moves over the years, and often has had to reverse course on them. Here are some of our favorites.

AT&T Launching a Mobile Hotspot App February 13th

App will debut on HTC Inspire 4G, and includes additional 2GB of data.

Samsung Galaxy S 4G on T-Mobile Coming This Month

Carrier says the new phone will be its first to fully exploit the new faster speeds of its HSPA+ network, but some key specs disappoint.

T-Mobile Outlines Plan to Become a 'Challenger' in Wireless Market

The nation's fourth largest wireless carrier hopes to return to prominence with high data speeds and low-cost devices and plans.

First 4G Apps Are Visual, Real-Time

HD video streaming, video calling, and multiplayer gaming will likely become the first hit apps for 4G networks.

Is a Sprint iPhone on the Way?

Sprint has a press event scheduled February 7. The same CDMA iPhone announced by Verizon Tuesday is compatible with Sprint's wireless network.

Verizon iPhone Could Be 4G ‘World Phone’

The new phone will support Verizon’s LTE network, as well as GSM-based wireless networks around the world.

Verizon iPhone Predictions: What It'll Look Like Inside and Out

Verizon is widely expected to (finally) announce its version of the iPhone on Tuesday in New York.

It's a Mad, Mad 4G World at CES 2011

The term '4G' is on everybody’s lips as device makers and carriers hurry to release devices capable of connecting to the fast new networks.

We Demo the Motorola Atrix

Join us on a quick tour of the new duel-core wonder from Motorola.

Video: Motorola Cliq 2

We get our first look at the successor to Motorola's original Cliq phone.

4G a War of Tech and Words at CES 2011

Carriers are vying for primacy in the 4G race. Some by talking, and some by talking and doing.

Verizon Announces Samsung 4G LTE Mobile Hotspot

The new device is small enough to fit in a pocket and connects up to five devices at a time to Verizon’s new LTE network.

Motorola Rolls Out Droid Bionic, Verizon’s First 4G LTE Phone

The new phone will leverage Verizon’s new LTE network, which the company says is up to ten times faster than 3G networks.


AT&T Playing Catch-Up in 4G Arms Race

Even though its existing 3G HSPA+ data network is as fast as some 4G networks, a growing 4G arms race has pressured AT&T to speed up the build of its 4G network.