NEW YORK -- Samsung is holding an event in New York next month to announce what is likely to be a successor to its flagship Galaxy S III smartphone.

In an invitation sent to journalists, Samsung Electronics Co. hints at a Galaxy S IV by teasing, "Ready 4 The Show." The March 14 event will be held at Radio City Music Hall.

Samsung began selling the S III last May. Samsung didn't say how soon after an announcement it would make a successor available for sale.

The Galaxy series runs on Google's (GOOG) Android system. The screen size has increased with each version: The Galaxy S had a screen that measured 4 inches diagonally. It was followed by the S II at 4.3 inches, and the S III at 4.8 inches.