After a couple of quarters of promising growth, Nokia’s smartphone unit sales suddenly shrank from the third quarter last year to the Christmas quarter of 2013. Smartphone sales usually grow sequentially into the Christmas quarter of any given calendar year. The most ominous possibility is that the Microsoft-Nokia announcement may have triggered a sudden consumer backlash against Nokia brand, particularly in the high-end category. There was reason to expect Nokia to deliver unit growth, because the cheap Lumia 500 series phone sales were still growing notably rapidly in the autumn, even in America. Two low-end Lumia models are still the two best-selling non-contract phones on Amazon. But overall handset revenue tanked by 29% in the fourth quarter last year. Many analysts had