Samsung shareholders vote on Friday over a $8 billion merger. Photo: Reuters.

Seoul - Samsung Electronics estimated Tuesday that its operating profit would plunge nearly 25 percent on year in the second quarter of 2014, hit by slowing smartphone sales and a strong won.

Operating profit was estimated at 7.2 trillion won ($7.1 billion) for the April-June period, compared to 9.53 trillion won a year ago - the South Korean electronic giant's third straight quarter of year-on-year decline. - Sapa-AFP