Microsoft Surface Duo vs Xiaomi Redmi K40S

Microsoft Surface Duo

Xiaomi Redmi K40S

Network
2G network

GSM 850, 900, 1800, 1900

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

HSDPA 850, 900, 1900, 2100

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

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 19 20, 25, 26, 28, 29, 30, 38, 39, 40, 41, 46, 66

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 (CA) Cat18, 1200 Mbps download, 100 Mbps upload

LTE-A
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5)

Glass front (Gorilla Glass 5), plastic back
SIM

Nano-SIM, eSIM

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

145.2 mm

163.2 mm
Width

93.3 mm

76 mm
Thickness

9.9 mm

7.7 mm
Height unfolded

186.9 mm

-
Width unfolded

145.2 mm

-
Thickness unfolded

4.8 mm

-
Weight

250 g

195 g
Stylus

Yes

-
Splash resistant

-

Yes
Colors

White

Black, Blue, Gray, Green

Display
Display type

AMOLED capacitive touchscreen

AMOLED
Physical size

8.1 inches

6.67 inches
Resolution

1800 x 2700 pixels

1080 x 2400 pixels
Pixel density

401 ppi

395 ppi
Display colors

16777216

16777216
Protection

Corning Gorilla Glass 5

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

-

120Hz, HDR10+, 1300 nits (peak)
Cover display

AMOLED capacitive touchscreen

-
Cover display physical size

5.6 inches

-
Cover display resolution

1350 x 1800 pixels

-

Main camera
Camera type

Single

Triple
Main camera

11 MP, f/2.0 , 23 mm, 1.0 µm

48 MP, f/1.8 , 0.8 µm, (wide) , 1/2"
(ultrawide) , 8 MP, 119˚
(macro) , 2 MP, f/2.4
Primary camera resolution

-

8000 x 6000 pixels
Primary camera video

4K@30/60fps, 1080p@30/60fps, gyro-EIS

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

-

dual-LED dual-tone flash
Camera features

-

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, 802.11n 5Ghz, 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

Yes
USB

Type-C reversible connector

Type-C 2.0
USB On-The-Go

-

Yes
Bluetooth

v5.0

v5.2
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

aptX Adaptive

-
NFC

-

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

-

Yes
GALILEO

-

Yes
BDS

-

Yes
QZSS

-

Yes
NavIC

-

Yes