Samsung Galaxy A21 vs Xiaomi Redmi K40S

Samsung Galaxy A21

Xiaomi Redmi K40S

Network
2G network

GSM 850, 900, 1800, 1900; CDMA 800, 1900

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

HSDPA 850, 900, 1700(AWS), 1900, 2100 - USA; CDMA2000 1xEV-DO

HSDPA 850, 900, 1700(AWS), 1900, 2100; CDMA2000 1x
4G network

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 25, 26, 28, 38, 39, 40, 41, 66, 71 - USA

LTE frequency band 1, 2, 3, 4, 5, 8, 18, 19, 26, 34, 38, 39, 40, 41, 42
5G network

-

5G band 1, 3, 5, 8, 28, 38, 40, 41, 77, 78 SA/NSA
HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
LTE speed

LTE, Cat4, 151 Mbps download, 51 Mbps upload

LTE-A
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Glass front, plastic back, plastic frame

Glass front (Gorilla Glass 5), plastic back
SIM

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

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

167.8 mm

163.2 mm
Width

76.7 mm

76 mm
Thickness

8.1 mm

7.7 mm
Weight

193 g

195 g
Splash resistant

-

Yes
Colors

Black

Black, Blue, Gray, Green

Display
Display type

IPS LCD capacitive touchscreen

AMOLED
Physical size

6.5 inches

6.67 inches
Resolution

720 x 1600 pixels

1080 x 2400 pixels
Pixel density

270 ppi

395 ppi
Display colors

16777216

16777216
Protection

-

Scratch resistant, 2.5D curved glass screen, Corning Gorilla Glass 5
Display features

-

120Hz, HDR10+, 1300 nits (peak)

Main camera
Camera type

Quad

Triple
Main camera

16 MP, f/1.8 , 1/3.06" , 1.0 µm

48 MP, f/1.8 , 1/2" , 0.8 µm, (wide)
8 MP, f/2.2 , 1/4.0" , 1.12 µm

8 MP, (ultrawide) , 119˚
2 MP, f/2.4

2 MP, f/2.4 , (macro)
2 MP, f/2.4
Primary camera resolution

4608 x 3456 pixels

8000 x 6000 pixels
Primary camera video

1080p@30fps

4K@30fps, 1080p@30/60/120fps, 720p@960fps; gyro-EIS
Primary camera flash

LED flash

dual-LED dual-tone flash
Camera features

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

Autofocus, continuous shooting, digital zoom, optical 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 802.11b, 802.11g, 802.11n

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

Yes

Yes
WLAN WiFi Direct

Yes

Yes
WLAN WiFi Dual Band

Yes

Yes
USB

Type-C 1.0 reversible connector

Type-C 2.0
USB On-The-Go

-

Yes
Bluetooth

v5.0

v5.2
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
NFC

Yes (market dependent)

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

-

Yes
Beidou

Yes

-
BDS

-

Yes
QZSS

-

Yes
NavIC

-

Yes