Even as Samsung continues to ride high on the success of its flagship Galaxy Note 4 phablet, buzz surrounding the refresh of the Galaxy S5 smartphone - the Galaxy S6 - is gathering momentum.

Speculations surrounding the impending Galaxy S6 are creating quite a stir online and tech pundits opine that the next iteration of the Samsung smartphone will undoubtedly up the ante for Apple.

With sales for the Galaxy S5 not living up to the company's expectation, Samsung will be hoping that the Galaxy S6 is leaps ahead of its predecessor and has innovative features to entice consumers.

Design-wise, Samsung phones have often been criticized because of their plastic exterior, which imparts a cheap look to the device when compared to the metal exterior on rival iPhone.

Keeping in mind consumer preferences, Samsung will likely focus on a metallic design for the Galaxy S6 and do away with the plastic casing. Rumors point to Samsung using graphene for the casing, but a strong possibility exists that the company will stick to the metal design deployed by its Galaxy Alpha.

Rumors suggest that even though the Galaxy S6 will either deploy the Super AMOLED or a QHD screen, the smartphone will be bigger than the previous iteration and have a 5.2-inch or 5.5-inch screen. The Galaxy S6 will take things a step further and could sport a 4K display with a resolution of 3840 x 2160 pixels.

It is also conjectured that the Galaxy S6 may tout a curved or flexible display like the one sported by the company's Galaxy Round.

The Galaxy S6 is also expected to house the Snapdragon 810 chip, which supports 4K displays. The memory will also likely get a bump up to 4GB of RAM. What's more, to fuel the device, Samsung will most likely upgrade the battery from the 2800 mAh one found on the Galaxy S5.

Camera-wise, the Galaxy S6 is anticipated to get an upgrade as well. The Galaxy S6 is expected to pack in a 20-megapixel primary camera, an improvement over the Galaxy S5's 16-megapixel one.

The Galaxy S6 is also rumored to pack in a fingerprint scanner and up the stakes by building in a retina scanner as well. Like the Galaxy Note 4, the Galaxy S6 is also expected to come equipped with a UV sensor and a heart rate monitor.

While Samsung has been focusing on its Tizen OS, chances are that the Galaxy S6 will opt for Android 5.0 Lollipop instead and have a new variant of TouchWiz UI running on top.

The Galaxy S6 is expected to roll out at the MWC in March next year.

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