The Galaxy Round's 5.7-inch (14.4-centimetre) display has a slight horizontal curve and weighs less than the Galaxy Note 3, allowing a more comfortable grip than other flat-screen models on the market, mobile carrier SK Telecom Co Ltd said in a statement.

Curved displays open up possibilities for bendable designs that could eventually transform the high-end smartphone market by allowing mobile and wearable gadgets to take new forms.

LG Electronics Inc plans to introduce a smartphone with a vertically curved display in November, a source familiar with the matter said this week.

Samsung's new phone, available through South Korea's biggest mobile carrier SK Telecom, costs 1.089 million won.