Windows Phone has 3.4% of smartphone installed base which is 0.1% less than October 2014 figure of 3.5%. Though with growth in smartphone installed base from October to November the Windows Phone share in absolute numbers may have remained same. Recent lack of support from Verizon and the carrier exclusives may be usual suspects here.
Android and iOS take the top two spots with Android growing by 0.6% and iOS declining by 0.2%.