At the Nokia Lumia 920 is doing more than fine in the U.S. market and is among the biggest sellers moving behind another as the Apple iPhone 5 and Samsung Galaxy S III. Recently a tweet by Tom Warren from Microsoft suggests that Nokia would launch a high-end smartphone for Verizon exclusive. Many assume that this tweet refers to the Lumia 920, which is not currently available via Verizon, but there may be something beyond all this.While it is...