iOS continues to lead as the top selling smartphone platform sold in the U.S, with 51.2% of market sales for the 12 week period ending December 23rd, 2012, according to data released today by Kantar Worldpanel ComTech.

Interesting to note that Android “remained stable” year over year, with Windows a very distant third.

The same company also says iPhone is big in Japan, taking two-thirds of the smartphone market.