While Samsung's Galaxy S6 is undoubtedly superior to the Galaxy S5, the new flagship handset lacks some of the features that the S5 is offering.
We're talking about a water-resistant body, microSD card support, and removable battery. Well, the first issue (at least) should be addressed by the Galaxy S6 Active, a rugged variant of the Galaxy S6 that might be officially announced in the near future.
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As you can see above, Samsung Galaxy S6 Active is built like a tank. The handset keep the camera and heart rate monitor layout of the regular Galaxy S6, but has its loudspeaker moved to its back.
It is all but certain that Samsung Galaxy S6 Active will not offer a fingerprint sensor due to its rugged buttons. This is hardly a surprise as last year's Samsung Galaxy S5 Active didn't have the feature either.
According to the source of the images, Samsung Galaxy S6 Active will sport the model number SM-G890A. The handset will pack a generous 3,500mAh battery. The latter is significantly larger than the 2,600mAh uint of the SM-G920.
Battery capacity aside, we can reasonably expect that Samsung Galaxy S6 Active will keep the same top notch specs as the Galaxy S6. They include a 5.1 inch Quad HD display, octa-core Exynos 7420 processor, 3 GB of RAM, 5 MP front-facing camera, and a 16 MP rear camera.
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Speaking about the rear, we can see that the S6 Active also has a heart rate sensor. At the moment, the presence of a microSD card slot can't be confirmed.