Launched at the IFA trade show here, the Note 4 features a 5.7-inch quad high-definition Super Amoled screen, 2.7 GHz quadcore processor (or 1.9 GHz octacore processor depending on the country), 16 MP rear and 3.7 MP front camera.
The Note Edge, which features a slightly smaller 5.6 inch Super Amoled screen, has a display that curves around on one side of the phone.
Galaxy Note 4 will be available in global markets starting October, while Note Edge will be available in select markets through Samsung's retail channels, e-commerce and carriers later this year.
The new Galaxy Note 4 introduces the most refined Note experience to-date by combining all the latest technology that users expect from the Galaxy series, he added.
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Samsung, which is the world's largest smartphone maker, is betting big on these launches as it faces tough competition from the US-based Apple.
The Cupertino-based firm is expected to launch a larger screen variant of its popular iPhone, along with a new smartwatch.
According to research firm IDC, 301.3 million smartphones were sold globally in April-June 2014, up 25.3 per cent from 240.5 million units shipped in the same period last year.
Samsung accounted for over 25 per cent share, while Apple had over 11 per cent share.