Microsoft’s revamped Windows operating system–Windows 8–launched last week on desktops, laptops, and tablets but the mobile version of its flagship OS is available for purchase today. The tech giant’s latest attempt to establish itself in a smartphone market seemingly cornered by Apple and Samsung comes in the form of Nokia’s Lumia 920 featuring Windows Phone 8.

CNN Money notes that “Microsoft’s smartphone market share fell to just 3.6% in September,” something Microsoft is hoping the Lumia will remedy. And while it’s still too early to tell how well the smartphone is going to fair, pre-order sales were abruptly taken off retailer websites after being up for mere hours in mid-October.

For a contracted price from AT&T of $99.99 (significantly less than the iPhone 5) users will get a 4.5-inch 1280 x 768 HD touchscreen display, a Snapdragon S4 1.5GHz dual-core processor, 1.3GB of RAM and 32GB of storage. There will also be 4G LTE connectivity, NFC capability, and a front and 8.7 megapixel rear-facing camera. The Lumia hasn’t packed the same punch or cutting edge technology as rival smartphones but the addition of Windows Phone 8, sufficient memory, plenty of storage, and NFC make this phone more than accommodating in need of a practical device. A modest price tag is enough to sway and buyers during uncertain economic times.

Early reviews indicate the Nokia Lumia 920 and Windows Phone 8 tandem might be a darkhorse in the market dominated by the iPhone and Galaxy.

Examiner: “Those in the market for a high-end smartphone should definitely take a look at the Nokia Lumia 920. Although it is a bit heavy and doesn’t have the best battery life, the user experience is unique and exciting enough to warrant a purchase.”

Engadget: “Nokia may crown it the most innovative smartphone, and alongside embedded wireless charging, there’s plenty here to demonstrate that. But, for all that Windows Phone 8 does right (superb maps, zippy browser, simplicity), those holes in the app selection remain something that needs to be plugged.”

The Register: “Evidently, with the Lumia 920, Nokia can once again deliver a phone handset with a game-changing and useful new technology feature. But relying on a platform partner means marching to its tune – and Microsoft has improved the bedrock of its Phone OS stronger without improving userland as it should have. Ultimately, the choice comes down to whether the camera benefits are worth the weight. And if you want network freedom, you’re going to have to wait.”

CNet: “The Nokia Lumia 920 forges new Windows Phone ground with wireless charging support and a highly sensitive screen you can use with gloves. Moreover, Nokia helps fill in Windows Phone OS gaps with a few missing features. A thick, heavy build and slippery finish for some colors make the Lumia 920 harder to hold and carry, and the phone’s overhyped camera doesn’t have enough settings.Nokia’s Lumia 920 is heavy and thick, but if you want the most powerful, feature-rich Windows phone available, this is it.”

We want to know what you all think of the Nokia Lumia 920 and Windows Phone 8. Is it worth buying? Will it outperform its competitors? Do you plan on getting your hands on one? Let us know your thoughts in the comments section below.