Samsung Galaxy S9 hands-on review

Samsung Galaxy S9 and Samsung Galaxy S8 are same you will not find any difference between them.There are minor changes to Samsung S8 which makes it a better smartphone.With the Samsung galaxy S9 and samsung Galaxy S9 plus the camera has been" reimagined". Let's take a  closer look.
Design
The iris scanner is now darker so it blends in with the edges around the screen. These edges or bezels are also slightly smaller, giving you even more screen than before. Other than these two minor improvements, the front of these two new smartphones looks undeniably similar to that of its predecessors. That’s a good thing, because the Galaxy S9 continues to look stellar — super sleek and ultra-modern.
The most important thing is perhaps the placement of fingerprint sensor directly underneath the camera.It is certainly improved now.The sensor is lower, the flash is on the right side of the camera, and specifically on the Galaxy S9 Plus, you’ll find a dual-camera system. It’s the first time the Galaxy S-series features dual cameras — the first Galaxy device to utilize them is the Note8.The back of the phone doesn’t mention the device’s name, it just has Samsung’s logo in the center, a minor change over last year. There’s still the curved edges (also on the front), along with the all-glass back for fast wireless charging.
The left edge holds volume rocker.You can find the power button on the right side.The speaker, for the first time, works in tandem with the earpiece at the top of the phone, offering stereo sound 

tuned by AKG that’s 1.4 times louder than the Galaxy S8. Best of all, the speakers utilizen Dolby Atmos technology, , which helps make it room-filling and immersive. We’re impressed with the sound quality and how loud the speakers got from the brief music we heard. Still, it’s a bummer Samsung didn’t use dual front-facing speakers.
These changes improve the user experience.
Camera and slow motion.
The Galaxy S9 has the mechanical aperture that we have never seen before.Aperture is the hole in camera that takes the light in.More big the aperture the more light camera can use and it is useful especially in low light photography.
t’s a mechanical lens, which means if you look at the back of the camera, you can see it switch between apertures. Samsung said the camera uses the f/2.4 aperture during the day, when the camera doesn’t need to take in as much light, while it automatically opts for the f/1.5 aperture at night to absorb as much as possible. You’re meant to never really notice this change happening when you use the camera, so how does it fare in general use? The S9 took photos quickly, and in the limited time we had, the results looked good. We’ll be experimenting with the camera during Mobile World Congress, so we’ll add more thoughts here once we’ve spent more time with it in varying lighting conditions. The Galaxy S9 Plus does indeed come with a second lens — a 12-megapixel, f/2.4 telephoto lens. It does the same thing as the second camera on the Galaxy Note 8. You can take Portrait Mode-like photos with the Live Focus tool, where a blur effect is added behind subjects, and you can utilize the 2× optical zoom to take close up photos of remote objects.
The camera app has been redesigned to make it easier to swipe between different modes.The galaxy S9 and S8 can shoot slow motion upto 960 frames per second.
Price and availability.

The Galaxy S9 and S9 Plus will be available for pre-order on March 2, with official retail availability starting on March 16. Grabbing the Galaxy S9 from Samsung will set you back $719.99, or $30 a month for 24 months, while the S9 Plus will start from $839.99, or $35 a month for 24 months. If you’re looking to upgrade from an older Samsung Galaxy device, then Samsung is also offering a trade-in program that could see a maximum of $350 taken off the price of a brand new Galaxy S9 or S9 Plus. Is there a reason to upgrade from the Galaxy S8? Not really, unless the fingerprint sensor bothers you that much, or you hate the camera. If you’re coming from a Galaxy S7, the camera will easily impress, as will everything else. We’ll need to do more testing to see how the phone fares against the current competition.