Nokia and the Symbian OS has always sold well outside the United States, because everywhere but the United States GSM is the standard, and that is Nokia's specialty. Nokia still sells relatively well outside the US, but it still losing to the Android (BIG TIME). I like my Nokia E71x, but I want an Android, however, I'm on the ATT network and switching is more of a hassle, unless GSM becomes the standard.
I have messed around with both an Android and a Windows Phone 7, I give the upper hand to the Android platform, although Windows Phone 7 is great in its own right, I would buy a Nokia Windows Phone 7 phone, because of my brand loyalty (to Nokia and Windows).