Nokia's market share in the United States is under 7%.

Ten years ago, Nokia held 50% of the U.S. wireless phone market. Today, Nokia's market share in the United States is well under 7%.
Nokia has several problems that need to be addressed.
For years, Nokia insisted on making phones the way it wanted to and was not willing meet operator requests.

U.S. operators don't sell (many) Nokia phones. And the Nokia phones the carriers do sell are the lowest-margin, entry-level handsets that Nokia churns out in the hundreds of millions for emerging markets. Without U.S. network operator support, Nokia isn't going to gain any traction in the U.S.

[Second, Nokia has to offer features and devices that U.S. consumers want. In the past, Nokia has modified phones primarily targeted at Asian and European markets to work in the United States rather than design new phones specifically for the United States. (CDMA-based feature phones aside.) Let's look at the recently announced Windows Phone-based Lumia 800 and 710 as examples of what Nokia is doing wrong. Right now, the features that help to sell bucketloads of Android smartphones and iPhones are things such as user-facing cameras for video chats, expandable memory, mobile hotspot support, 4G support, huge high-def screens, dual-core processors, near-field communications, and so on. Though some of this is to blame on the specs for Windows Phone 7.5 Mango, Nokia (and Microsoft) need to move past these limitations and design some great hardware for the United States.

Thankfully, Nokia CEO Stephen Elop said at the Nokia World event in London that the company plans to address the U.S. market specifically with devices catered to U.S. networks (read, CDMA and LTE 4G Nokia phones). Elop didn't say if they will be modified versions of the Lumia 800 and 710, or if they will be brand new phones.

Beyond operator support and hardware features, Nokia's mindshare in the United States is extremely low. To combat this, Nokia said that it is undertaking a huge marketing campaign. The company is going all-out to make sure its Windows Phone 7 smartphones are successful. In between the Windows Phone hubaloo at Nokia World this week, the Finnish manufacturer announced a software update and new color for the Nokia N9, a gorgeous slab phone launched in June.

Existing N9 owners will also receive a software update next quarter, Nokia announced. Nokia's NFC tap-to-pair accessories, like the Nokia Play 360 speaker and Nokia Luna Bluetooth headset, lets you do things like tapping your N9 against the speaker and control output through your phone.
Meanwhile, MeeGo is a Maemo/Moblin hybrid operating system launched by Intel and Nokia in February 2010.

The comment yesterday by Nokia's CEO Stephen Elop was intended to disparage rival Windows Phone manufacturers. Nokia also hoped it the combative approach would demonstrate that the Finnish phone maker was not “in Microsoft’s pocket”.
I think Nokia’s bringing that to the table.