HTC has finally launched its first Android smartphone to ship with Ice Cream Sandwich—and it's a winner. The HTC One S packs a next-generation dual-core processor, a vibrant screen, an unusually capable camera, and fast HSPA+ 42 data speeds, all into one of the slimmest and lightest designs we've seen. Despite a few minor issues, the HTC One S is our favorite new smartphone on T-Mobile and a clear Editors' Choice.
Design and Call Quality
Slim and light, the HTC One S measures 5.15 by 2.56 by 0.35 inches (HWD), with a thinner 0.31-inch portion in the center, and weighs roughly 4.2 ounces. HTC doesn't provide an official weight figure, but the One S is slightly lighter than the 4.9-ounce iPhone 4S we had on hand. HTC's high-end handsets typically feel expensive, and the One S is no exception, with its rounded, gray aluminum body. This one goes several steps further, though. First, it's almost impossibly slim, thanks to its unibody design—the Verizon Motorola Droid RAZR is slimmer still at 0.28 inches, but the difference is largely academic given how good the One S looks. The gradient anodized finish also lends an extra dose of class, not to mention durability. A prominent volume rocker sits on the left side panel, while the top edge houses the Power button and a standard 3.5mm headphone jack.
The 4.3-inch, 960-by-540-pixel, Super AMOLED glass capacitive screen looks beautiful at first glance, with vibrant color, a bright backlight, wide viewing angles, and deep blacks. It's also very responsive; typing on the on-screen QWERTY keyboard is an absolute joy. HTC's own keyboard layout is present, and you can switch on Swype if you prefer that. There's only one issue with the screen: It's a PenTile display. That means the arrangement of subpixels results in mild stippling that many people don't mind (including me), but others find irritating. Mainly, it surfaces in fuzzier-than-typical text, and on dark gray backgrounds; you can really see it when it's next to a phone without a PenTile display. Suffice to say it's worth a look in person to see what you think.
The HTC One S is a quad-band EDGE (850/900/1800/1900 MHz) and tri-band HSPA+ 42 (900/1700/2100 MHz) device with 802.11b/g/n Wi-Fi. Download speeds generally landed in the 4 to 7 Mbps range—good, but not the best we've seen for HSPA+ 42. Ping times were often just over a second—though a few results were normal, at under 100 milliseconds—and upload speeds struggled to break 1Mbps, with most landing in the 500 to 700Kbps range. T-Mobile says our otherwise production review unit isn't provisioned yet for HSPA+ 42, and that by the time consumers get them next week, they'll all be operating at full speed.
Call quality is excellent for a T-Mobile phone. In my tests, voices sounded clear and crisp, if slightly thin, in the earpiece, with a surprising amount of gain considering there's precious little room for a speaker. Transmissions through the mic were clear and well defined, although a good amount of street noise made its way in. Calls sounded perfectly clear through a Jawbone Era Bluetooth headset ($129, 4.5 stars), but voice dialing didn't work at all over Bluetooth, which is a bizarre omission in a 2012 phone. The speakerphone sounds tinny at maximum volume, and isn't loud enough for outdoor use. There's a 1650mAh battery that we're in the process of testing. We'll post the results as soon as they're available.
Hardware, OS, and Apps
The dual-core 1.5GHz Qualcomm MSM8260A Snapdragon S4 processor is undeniably powerful, benchmarking considerably faster than the Samsung Galaxy S II ($229.99, 4.5 stars) by roughly 20 percent, and the HTC Amaze 4G ($149.99, 4 stars) by about 30 percent—and both of those are dual-core phones.
We can credit at least some of this speed to Android 4.0 (Ice Cream Sandwich) as well. HTC seems to have struck a nice balance between Android 4.0's various UI refinements, and its own, lighter-than-before HTC Sense 4.0 UI layer and widgets. In testing, the phone felt quite responsive, and raced through day-to-day tasks without so much as a hiccup. Frame rate tests stayed consistently just above 60 frames per second in several benchmarks, making this a superb phone for gaming.
While HTC devoted the bulk of its customization work to the camera and music apps (more on those below), there are some other nice touches throughout. Email conversations are threaded, and a sliding Recently Used Apps view lets you switch tasks with a finger swipe and tap. There are HTC's trademark clock and weather widgets, the latter of which now shows a spinning globe for tracking world time and weather. A beautiful Car Mode pops up a landscape display with large icons for navigation, music, Internet radio, and phone calls, and customized one-level-down interfaces for easier access while you're behind the wheel. You can't change up the main icons, though; it would have been nice to pop in a shortcut to iOnRoad Augmented Driving (free, 3.5 stars), but that's nitpicking.
Otherwise, there are over 400,000 third-party apps in Google Play, most of which should run just fine on the One S, given its up-to-date OS and relatively common screen resolution. You also get free voice-enabled GPS navigation standard. There's a good amount of pesky T-Mobile bloatware you can't remove like Game Base, My T-Mobile, T-Mobile Name ID, and T-Mobile Mall.
Browsing is very fast, although you can see the PenTile display issues on Web pages with small fonts, and Flash-encoded pages I tried didn't work. HTC's own SmartSync app is smart enough to learn your email checking habits, and then reduces push and polling accordingly to conserve battery power.
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Rosa Golijan via Technolog 
The most welcome addition was the hardest to implement. One of the big selling points in asynchronous multiplayer games is internal chat. But integrating the feature into a game where words are not supposed to be exchanged was tricky. The solution OMGPOP and Zynga came up with is pretty clever. The chat option appears only after a drawing is completed and the message is conveyed only after the round ends.