Review of the Samsung Galaxy S21 smartphone: advantages of the device

Design, display, characteristics of a modern smartphone Samsung Galaxy S21.

Samsung smartphones have long been popular. Samsung Galaxy S21 is the company’s new flagship. Visually, it is similar to the previous generation, only the back cover is different. Slim body, rounded ends, SIM tray at the bottom. On the right are the volume control keys and the lock button.

There are several colors available for the Galaxy S21 – purple, gray, pink and white phantoms. The device has a matte finish, so it does not collect fingerprints. Reinforced polycarbonate is used as the material. It is resistant to falls.

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Display Features

The smartphone has a Dynamic AMOLED 2X matrix that supports Full HD+resolution. The screen diagonal of the device is 6.2 inches. Excellent contrast, an impressive supply of brightness, the picture at any angle is as clear as possible. The color rendering is easily configurable.

Dynamic change of display frequency is supported. The manufacturer took this step to achieve a balance between power consumption and smoothness of the image.

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The camera in your smartphone

The resolution of the main camera is 12 MP. Optical image stabilization is supported. The second sensor is an ultra – wide-angle twelve-megapixel sensor. The resolution of the third sensor is 64 MP, it is designed for shooting images with zooming. For the front camera, a ten-megapixel module is used.

The shooting is conducted at a high level, the manufacturer has professionally approached the software improvements. In the new generation of smartphones, it was possible to achieve high stabilization during video recording.

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The main element of the new smartphone is a modern Exynos 2100 chipset, which is manufactured using a 5 nm process technology. High power, improved energy efficiency, task processing speed-the smartphone will delight users with instant opening of applications. Eight cores, high performance, GPU power is also at a high level.

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The new devices became a logical continuation of the previous ones. Outwardly, they are more expressive, the manufacturer has worked on the camera software, the new chipset has allowed for improved performance. High autonomy, outstanding shooting quality, updated features-the device deserves close attention from buyers.

The controversial points include the lack of support for memory cards, headphones and charging are also not included.

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SPECIFICATION

NETWORK

2G bands GSM 850 / 900 / 1800 / 1900 – SIM 1 & SIM 2
3G bands HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 13(700), 17(700), 18(800), 19(800), 20(800), 25(1900), 26(850), 28(700), 32(1500), 38(2600), 39(1900), 40(2300), 41(2500), 66(1700/2100)
5G bands *(make sure your carrier support the 5G bands)

BODY

Dimensions 165.1 x 75.6 x 8.9 mm (6.5 x 2.98 x 0.35 in)
Weight 227 g (Sub6), 229 g (mmWave) (8.01 oz)
Build Glass front (Gorilla Glass Victus), glass back (Gorilla Glass), aluminum frame
SIM Dual SIM (Nano-SIM , dual stand-by)
IP68 dust/water resistant (up to 1.5m for 30 mins)
Stylus support

DISPLAY

Type Dynamic AMOLED 2X, 120Hz, HDR10+, 1500 nits (peak)
Size 6.8 inches, 112.1 cm2 (~89.8% screen-to-body ratio)
Resolution 1440 x 3200 pixels, 20:9 ratio (~515 ppi density)
Protection Corning Gorilla Glass Victus
Always-on display

PLATFORM

OS Android 11, One UI 3.1
Chipset Exynos 2100 (5 nm)
CPU Octa-core (1×2.9 GHz Cortex-X1 & 3×2.80 GHz Cortex-A78 & 4×2.2 GHz Cortex-A55)
GPU Mali-G78 MP14

MEMORY

Card slot No
Internal 256GB 12GB RAM
UFS 3.1

MAIN CAMERA

Quad 108 MP (2nd gen), f/1.8, 26mm (wide), 1/1.33″, 0.8µm, PDAF, Laser AF, OIS
10 MP, f/4.9, 240mm (periscope telephoto), 1/3.24″, 1.22µm, dual pixel PDAF, OIS, 10x optical zoom
10 MP, f/2.4, 70mm (telephoto), 1/3.24″, 1.22µm, dual pixel PDAF, OIS, 3x optical zoom
12 MP, f/2.2, 13mm (ultrawide), 1/2.55″, 1.4µm, dual pixel PDAF, Super Steady video
Features LED flash, auto-HDR, panorama
Video 8K@24fps, 4K@30/60fps, 1080p@30/60/240fps, 720p@960fps, HDR10+, stereo sound rec., gyro-EIS

SELFIE CAMERA

Single 40 MP, f/2.2, 26mm (wide), 1/2.8″, 0.7µm, PDAF
Features Dual video call, Auto-HDR
Video 4K@30/60fps, 1080p@30fps

SOUND

Loudspeaker Yes, with stereo speakers
3.5mm jack No
32-bit/384kHz audio
Tuned by AKG

COMMS WLAN

Wi-Fi 802.11 a/b/g/n/ac/6e, dual-band, Wi-Fi Direct, hotspot
Bluetooth 5.2, A2DP, LE
GPS Yes, with A-GPS, GLONASS, BDS, GALILEO
NFC Yes
Radio FM radio (Snapdragon model only; market/operator dependent)

USB

USB Type-C 3.2, USB On-The-Go

FEATURES

Sensors Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer
Samsung DeX, Samsung Wireless DeX (desktop experience support)
ANT+
Bixby natural language commands and dictation

BATTERY

Type Li-Po 5000 mAh, non-removable

Mobile Data Mining

Springer. 2018

This SpringerBrief presents a typical life-cycle of mobile data mining applications, including: data capturing and processing which determines what data to collect, how to collect these data, and how to reduce the noise in the data based on smartphone sensors feature engineering which extracts and selects features to serve as the input of algorithms based on the collected and processed data model and algorithm design In particular, this brief concentrates on the model and algorithm design...