Steve Guttenberg/CNET Subwoofers are used in most home theater systems, but subs can also radically improve the sound of stereo systems — and not just the ones with small speakers. Subs can provide a foundation to the sound that few speakers can muster on their own. So adding a sub is not just about adding …

Sharing is a big part of Samsung’s products (just think of all those ads in recent months, like the one with a woman giving her husband a secret video). Now the Korean electronics giant is taking that a step further with the Galaxy S4’s improved Group Play. Related stories CNET’s take on the Galaxy S4 Beyond the Galaxy S4 hype: …

BlackBerry plans to ask U.S. and Canadian regulators to probe a report about high return rates for the company’s flagship Z10 smartphone, calling the comments “false and misleading.” The Canadian company said that within the next several days, it will formally ask the U.S. Securities and Exchange Commission and the Ontario Securities Commission to review a report from research and …

Now playing: Watch this: Apple iPhone evolution 7:54 NOTE: We’ve updated this video to a more recent version that includes the iPhone 5S and iPhone 5C. To see the most recent edition, click here. Prepare yourself for a heady dose of tech nostalgia, as we explore the origins — and evolution — of Apple’s iPhone. Hit play on the video …

UK regulator the Office of Fair Trading is investigating whether in-app payments illegally tempt children to spend their parents’ money. After a series of high-profile incidents in which children have racked up bills of thousands of pounds on digital goods such as in-game currency and items, the OFT is looking into industry practices. While being careful to stress this investigation …

Samsung Galaxy S II Skyrocket owners finally have their shot at Android 4.1. Available as of Wednesday, the Jelly Bean flavor of Android can be downloaded courtesy of AT&T. Users can update their OS to Android 4.1.2 by following the how-to page on the carrier’s Web site. The update does require Galaxy S2 Skyrocket users to download the software through …

At long last, T-Mobile announced that it will carry its own iPhone 5, in addition to letting you bring over an unlocked iPhone 5 from another carrier, like from AT&T. Yet, when T-Mobile’s own iPhone hits stores on April 12, it’ll be a slightly different model and experience compared with other carriers. Here’s what’s altered. Related stories T-Mobile sells the …

Verizon has kicked off a new prepaid plan to lure in feature phone buyers. Launched yesterday, the new no-contract plan costs $35 a month and offers 500 anytime minutes of talk as well as unlimited text and Internet. Tipping over the 500 monthly minutes will ring up an extra 25 cents per minute. The deal is geared strictly toward feature …

Every parent knows (or should know) the importance of reading to their kids. And when it comes to stories adults and toddlers alike can enjoy, it’s hard to beat Dr. Seuss. Of course, browse the aisles (real or virtual) of any bookstore and you’ll see that your average Dr. Seuss hardcover can run $10-15. Ouch! That’s why I continue to …

Don’t want to wait for the Samsung Galaxy S4 to hit stores? Then perhaps you’ll be tempted by a new purple-hued version of Samsung’s hit handset from last year, the Galaxy S3. Sprint announced it will sell a special Amethyst Purple GS3, as well as the older Pebble Blue and Marble White models, for $99.99. Of course that discount applies …