The move is seen as an attempt by Samsung to revive momentum in its handset business which has been slumping lately.
Samsung’s market share fell in the second quarter when the company released its critically acclaimed S6 models.
The manufacturer responded with S6 price cuts and moving up the Note unveiling from its usual early September spot, ahead of the latest iPhone launch expected in September.
The event announcing the new gadgets was attended by more than 1,000 people, almost filling the Alice Tully Hall at the Lincoln Centre in New York.
The Galaxy Note 5 has a faster Exynos chip and the S6 edge+ screen size has increased from 5.1 inches to 5.7.
Samsung has high hopes for the Note. “Each new version has been more popular than the last,” said Justin Denison, vice president of product strategy and marketing for Samsung Electronics America.