Samsung Galaxy A7 Duos vs Samsung Galaxy S9 (Qualcomm Snapdragon 845)

Dustproof/water resistant at depth equal to or greater than 1 meter.

Device is protected with extra seals to prevent failures due to any kind of weather.

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Damage resistant glass (such as Corning Gorilla Glass or Asahi Dragontrail Glass) is thin, lightweight, and can withstand high levels of force.

The bigger the screen size is, the better the user experience.

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The device has a display with three full subpixels per pixel, resulting in a sharp and crisp picture. Pixels in some displays (like AMOLED) share one subpixel to preserve space. This can result in a less crisp, slightly blurred image.

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AMOLED displays, also known as active matrix OLED displays, offer higher refresh rates and consume less power than other types of displays.

IPS (In-Plane Switching) is a technology used for LCDs. It was designed to overcome the main limitations of normal TFTs TN-matrices: relatively slow response times, small viewing angles and low quality color reproduction.

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The system on a chip (SoC) has an integrated LTE cellular chip. LTE is capable of downloading at faster speeds than older, 3G technology.

The graphics processing unit (GPU) has a higher clock speed.

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It can support faster memory, which will give quicker system performance.

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With integrated graphics you don’t need to buy a separate graphics card.

More threads result in faster performance and better multitasking.

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Out-of-order execution is used in CPUs to make use of instruction cycles that would normally be wasted due to delays.

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Optical image stabilization uses gyroscopic sensors to detect the vibrations of the camera. The lens adjusts the optical path accordingly, ensuring that any type of motion blur is corrected before the sensor captures the image.

The maximum resolution available for videos shot with the main camera. Although it may be possible to choose among other frame rates, those recordings usually have lower resolutions.

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A phase detection autofocus is much faster than a contrast detection autofocus, allowing for sharper images.

A laser autofocus system quickly determines the depth of the subject you want to focus on, allowing you to take photos much faster.

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Devices with stereo speakers deliver sound from independent channels on both left and right sides, creating a richer sound and a better experience.

With a standard mini jack socket, you can use the device with most headphones.

More microphones result in better sound quality and enable the device to filter out background noise.

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It works as an FM radio with included headsets

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The music player can be blindly used.

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The device can save battery by using just a black-and-white screen with a few basic icons. This means even with a small amount of battery, you can keep the device running for a long time.

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The manufacturer offers a branded wireless charging kit. To charge the device, you simply put it down on its charging base.

The battery is removable and can be replaced by the user if broken.

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Fast charging technologies, like Qualcomm’s Quick Charge or MediaTek’s Pump Express, are used to reduce the time it takes to charge a device. For example, with Quick Charge 3.0, the battery can be charged to 50% in just 30 minutes.

An indicator shows you when the device has low battery.

Offline voice recognition enables you to perform voice actions, like dictating texts or using various voice commands, without an internet connection.

Anyone is free to use, copy, study, and change the software in any way, and the source code is openly shared so that people are encouraged to voluntarily improve the design of the software.

If an app has sharing capabilities and the developers have indicated it, the app will automatically appear in your list of sharing options. Some OS’s limit direct sharing options to a select few apps, which means you have to open apps separately in order to upload the files you want to share.