The Galaxy Gear is designed so that users wearing the watch can make and receive calls without removing their phone from their pockets or bags.
Wearers can answer calls by raising the watch to their ear.
More top news
An Egyptian billionaire has offered to buy an island from Greece or Italy and develop it to host migrants fleeing war-torn areas.
The number of children having private tutoring has increased by more than a third in the last decade, according to a charity.
Girls should swap dolls for toys such as Lego and Meccano to get them more interested in science and engineering, top scientist claims.