(Telecompaper) Samsung Electronics has announced KRW 56 trillion in estimated sales for the fourth quarter of 2012, up 18.4 percent on the fourth quarter of 2011, when it grew revenues 13 percent year-on-year to KRW 47.3 million. The company's preliminary figures show an operating profit up 89 percent to KRW 8.8 trillion, versus 76 percent growth to KRW 5.3 trillion in the fourth quarter of 2011. Although Samsung did not provide details of sales and profit by division, analysts see as the key driver success in the smartphone market, where it may have doubled profits.