Samsung Electronics, the world’s top maker of memory chips and smartphones, reported a record quarterly profit, aided by one-off gains and best-ever sales of high-end phones. The South Korean firm posted 5.2 trillion won ($4.5 billion) in quarterly operating profit, beating a consensus forecast of 4.7 trillion won by analysts surveyed by Thomson Reuters I/B/E/S. Samsung, which surged past Apple as the world’s top smartphone maker in the third quarter, only entered the smartphone market in earnest in 2010, but its handset division is now its biggest earnings generator.