Samsung Galaxy S8+ vs Xiaomi Redmi K20

Network
2G network

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900, CDMA 800
3G network

HSDPA 850, 900, 1700(AWS), 1900, 2100

HSDPA 850, 900, 1700, 1900, 2100, TD-SCDMA 1900, 2000
4G network

LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 17(700), 20(800), 28(700)

LTE frequency band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)
HSDPA speed

42.2 Mbps

42 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
EV-DO speed

-

3.1 Mbps download, 1.8 Mbps upload
LTE-A speed

LTE-A, (4CA) Cat16, 1024 Mbps download, 150 Mbps upload

-
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Corning Gorilla Glass 5 back panel

Aluminium alloy, glass
SIM

Single SIM (Nano-SIM) or Dual SIM (Nano-SIM, dual stand-by)

Dual SIM (Nano-SIM, dual SIM stand-by)
Height

159.5 mm

156.7 mm
Width

73.4 mm

74.3 mm
Thickness

8.1 mm

8.8 mm
Weight

173 g

191 g
Payment

Samsung Pay(Visa, Mastercard)

-
Waterproof

IP68 - 1.5 m and 30 minutes

-
Dust proof

IP68

-
Colors

Arctic Silver, Coral Blue, Maple Gold, Midnight Black, Orchid Gray

Black, Blue, Red

Display
Display type

Super AMOLED capacitive touchscreen

Super AMOLED capacitive touchscreen
Physical size

6.2 inches

6.39 inches
Resolution

1440 x 2960 pixels

1080 x 2340 pixels
Pixel density

529 ppi

403 ppi
Display colors

16777216

16777216
Protection

Corning Gorilla Glass 5

2.5D curved glass screen, Scratch resistant, Corning Gorilla Glass 6
Multitouch

Yes

Yes
Display features

-

HDR 10, Always-On display

Hardware
CPU

Octa-core

Octa-core
CPU

Quad-core 2.3 GHz

Dual-core 2.2 GHz Kryo 470
CPU(second)

quad-core 1.7 GHz

Hexa-core 1.8 GHz Kryo 470
Chipset

Qualcomm MSM8998 Snapdragon 835 - US / Exynos 8895 Octa - EMEA

Qualcomm Snapdragon 730
GPU

Adreno 540

Adreno 618
Memory RAM

4 GB

6, 8 GB
Internal storage

64 GB

64, 128, 256 GB
Memory card

microSD

No
Memory card max

256 GB

-
Storage

-

UFS 2.1

Main camera
Camera type

-

Triple
Main camera

12 MP, f/1.7 , 26 mm

48 MP, f/1.8 , 26 mm, 1/2" , 0.8 µm, 2x optical zoom
8 MP, f/2.4 , 53 mm, 1/4" , 1.12 µm
13 MP, f/2.4 , 12 mm, 1/3" , 1.12 µm
Primary camera resolution

-

8000 x 6000 pixels
Primary camera video

2160p@30fps, 1080p@60fps

2160p@30fps, 1080p@960fps
Primary camera flash

LED flash

dual LED flash
Primary camera optical image stabilization

optical image stabilization

-
Primary camera phase detection autofocus

phase detection autofocus

-
Primary camera video dual video

dual-video record

-
Primary camera video hdr

HDR

-
Camera features

1.4 µm pixel size, 1/2.5" sensor size, Auto HDR, face/smile detection, geo-tagging, panorama, simultaneous 4K video and 9MP image recording, touch focus

Autofocus, continuous shooting, digital zoom, optical zoom, digital image stabilization, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, macro mode, RAW, phase detection

Connectivity
WLAN

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5Ghz, 802.11ac
WLAN WiFi Hotspot

Yes

Yes
WLAN WiFi Direct

Yes

Yes
Wi-Fi display

-

Yes
WLAN WiFi Dual Band

Yes

Yes
USB

Type-C 1.0 reversible connector

Type-C reversible connector
USB On-The-Go

-

Yes
Bluetooth

v5.0

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

Yes

-
NFC

Yes

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

-
Beidou

-

Yes
BDS

Yes

-

Features
Messaging SMS

SMS(threaded view)

-
Messaging MMS

MMS

-
Messaging Email

Email

-
Messaging IM

IM

-
Messaging Push Mail

Push Mail

-
Java

No

-
Sensors

Iris scanner, SpO2, accelerometer, barometer, compass, fingerprint (rear-mounted), gyro, heart rate, proximity

Accelerometer, proximity, light, compass, in-display fingerprint, gyroscope, barometer, hall, step detector, step counter