Samsung Galaxy S8 vs Xiaomi Redmi K30

Network
2G network

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900; CDMA 800 & TD-SCDMA
3G network

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

HSDPA 850, 900, 2100; CDMA2000 1xEV-DO
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), 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
LTE speed

-

LTE-A
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)

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

148.9 mm

165.3 mm
Width

68.1 mm

76.6 mm
Thickness

8 mm

8.8 mm
Weight

155 g

208 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

Blue, Purple, Red

Display
Display type

Super AMOLED capacitive touchscreen

IPS LCD capacitive touchscreen
Physical size

5.8 inches

6.67 inches
Resolution

1440 x 2960 pixels

1080 x 2400 pixels
Pixel density

570 ppi

395 ppi
Display colors

16777216

16777216
Protection

Corning Gorilla Glass 5

2.5D curved glass screen, Scratch resistant, Corning Gorilla Glass 5, Oleophobic coating
Multitouch

Yes

Yes
Display features

-

HDR10, 120Hz sampling rate

Hardware
CPU

Octa-core

Octa-core
CPU

Quad-core 2.3 GHz

Dual-core 2.2 GHz Kryo 470 Gold
CPU(second)

quad-core 1.7 GHz

Hexa-core 1.8 GHz Kryo 470 Silver
Chipset

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

Qualcomm SDM730 Snapdragon 730G
GPU

Adreno 540 - US

Adreno 618
Memory RAM

4 GB

6, 8 GB
Internal storage

64 GB

64, 128, 256 GB
Memory card

microSD

microSD, microSDHC, microSDXC
Memory card max

256 GB

256 GB
Storage

-

UFS 2.1

Main camera
Camera type

-

Quad
Main camera

12 MP, f/1.7 , 26 mm

64 MP, f/1.9 , 26 mm, 1/1.7" , 0.8 µm
8 MP, f/2.2 , 13 mm, 1/4" , 1.12 µm
2 MP, f/2.4 , 1/5" , 1.75 µm
2 MP, f/2.4 , 1/5" , 1.75 µm
Primary camera resolution

-

9248 x 6944 pixels
Primary camera video

2160p@30fps, 1080p@60fps

2160p@30fps, 1080p@30/120fps, 720p@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, digital image stabilization, optical image stabilization, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, phase detection autofocus

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

-
Infrared

-

Yes
NFC

Yes

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

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, barometer, compass, geomagnetic, gravity, gyroscope, pedometer, proximity, light, side-mounted fingerprint sensor