Samsung Galaxy Note 4
A concept design photo of Samsung Galaxy Note

Fresh rumours of Galaxy Note 4 surface online via the Korean publication - ET News, which reports that the next-gen flagship phablet will be made of metal, feature flexible display and pack a 16MP camera with optical image stabilisation (OIS).

According to BGR, Galaxy Note 4 is expected to ship in two build variants: plastic and metal, although Samsung is reportedly experimenting with various build materials, including plastic, magnesium, steel and aluminium for its upcoming flagship device.

It is further rumoured that Galaxy Note 4 will be releasing in two display variants, one with flexible display and the other with regular screen, while Samsung has reportedly increased production of flexible panels by 50% in anticipation of the phablet launch at IFA in September.

Consequently, Note 4 could release in two device variants: one with metal case and flexible display, and the other with regular screen or non-flexible display and a plastic case.

Although the Note 3 features a 5.7in screen and comes in a plastic casing, there is no mention of screen size for the rumoured Note 4.

Contrary to earlier expectations, the Note 4 is rumoured to include a 16-megapixel rear camera with OIS instead of a 12MP snapper.

Among the rumoured features, the Galaxy Note 4 is expected to feature a bigger 5.9in QHD AMOLED display, 3GB RAM, and powered by Qualcomm's fastest processor till date, the quad-core Snapdragon 805 processor.

With Apple iPhone 6 widely expected for September release, the Note 4 could face stiff competition from the Cupertino-based company at the time of launch.