Samsung Electronics said Friday that stronger-than-expected sales of its Galaxy smartphones sent operating profits up 90 percent in the latest quarter, but analysts warned its results could take a hit in the coming months as it books legal damages owed to Apple. The South Korean electronics giant reported an operating profit of 8.1 trillion won ($7.3 billion) for the July-September period, almost double the 4.25 trillion won it made a year ago. That beat an average analyst estimate of 7.58 trillion won during the quarter compiled by Bloomberg.