Xiaomi Redmi 9 vs Xiaomi Redmi K40S

Xiaomi Redmi 9

Xiaomi Redmi K40S

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(AWS), 1900, 2100; CDMA2000 1x
4G network

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 20, 28, 38, 40, 41

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-A

LTE-A
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Glass front (Gorilla Glass 3), plastic back, plastic frame

Glass front (Gorilla Glass 5), plastic back
SIM

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

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

163.3 mm

163.2 mm
Width

77 mm

76 mm
Thickness

9.1 mm

7.7 mm
Weight

198 g

195 g
Splash resistant

-

Yes
Colors

Blue/Pink, Gray, Green, Purple

Black, Blue, Gray, Green

Display
Display type

IPS LCD capacitive touchscreen

AMOLED
Physical size

6.53 inches

6.67 inches
Resolution

1080 x 2340 pixels

1080 x 2400 pixels
Pixel density

395 ppi

395 ppi
Display colors

16777216

16777216
Protection

Scratch resistant, 2.5D curved glass screen, Corning Gorilla Glass 3

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

13 MP, f/2.2 , 28 mm, 1/3.1" , 1.12 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˚
5 MP, f/2.4

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

4160 x 3120 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, digital zoom, digital image stabilization, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, phase detection autofocus

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 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac

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
USB

Type-C 1.0 reversible connector

Type-C 2.0
USB On-The-Go

Yes

Yes
Bluetooth

v5.0

v5.2
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Infrared

Yes

-
NFC

-

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

-

Yes
Beidou

Yes

-
BDS

-

Yes
QZSS

-

Yes
NavIC

-

Yes

Features
Sensors

Accelerometer, compass, fingerprint, proximity

Accelerometer, color spectrum, compass, fingerprint, gyroscope, proximity

Battery
Battery type

Li-Po

Li-Po
Battery capacity

5020 mAh

4500 mAh
Battery removable

Non-removable

Non-removable
Fast battery charging

Qualcomm Quick Charge 3.0

Quick Charge 3+, 67W (100% in 38 min)
DxOMark autonomy

55

-
DxOMark charging

51

-
DxOMark efficiency

55

-
DxOMark battery score

54

-

Xiaomi Redmi 9 comparisons