Samsung promotes Lee's son and heir to vice chairman

"As vice-chairman, Lee will build on his existing responsibilities and take a broader role in managing Samsung Electronics' businesses," it said in a statement.

"Lee will continue to play a critical role in transforming Samsung's business model - the set (product) business into one based on a platform and the component business into a total solution provider."

Jay Lee, 44, was thrust into the spotlight in June when then Samsung Electronics chief executive Choi Gee-sung, known to be his mentor, was promoted to lead the entire Samsung group's strategy, a defacto No.2 role within the group to chairman Lee.

Observers said at the time that Choi's move was aimed at preparing a succession plan for Jay Lee.

Samsung Group was founded in 1938 by Lee Byung-chull, Jay Lee's grandfather, as a small trading company and Samsung Electronics which is the jewel in the crown of its vast industrial empire now sells more mobile telephones than any other company