Xiaomi Redmi Note 8T vs Samsung Galaxy A40 vs Xiaomi Redmi Note 9

Compare phone and tablet specifications of up to three devices at once.

Display

Size:

6.3 inches
5.9 inches
6.5 inches

Resolution:

2340 x 1080 pixels, 19.5:9 ratio, 409 PPI
2340 x 1080 pixels, 19.5:9 ratio, 437 PPI
2340 x 1080 pixels, 19.5:9 ratio, 395 PPI

Technology:

IPS LCD
Super AMOLED
IPS LCD

Screen-to-body:

80.20 %
85.73 %
83.52 %

Features:

Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor

Hardware

System chip:

Qualcomm Snapdragon 665 SM6125
Exynos 7904
MediaTek Helio G85

Processor:

Octa-core, 2000 MHz, Kryo 260, 64-bit, 11 nm
Octa-core, 1800 MHz, ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 14 nm
Octa-core, 2000 MHz, Arm Cortex-A75 and ArmCortex-A55, 64-bit, 12 nm

GPU:

Adreno 610
Mali-G71 MP2
Mali G52 MC2

RAM:

3GB
4GB LPDDR4
3GB LPDDR4

Internal storage:

32GB
64GB, available to use: 49.4 GB
64GB (eMMC 5.1)

Storage expansion:

microSDXC up to 256 GB
microSDXC up to 512 GB
microSDXC up to 128 GB

Device type:

Smartphone
Smartphone
Smartphone

OS:

Android (9.0 Pie)
Android (11, 10, 9.0 Pie), Samsung One UI
Android (10), Xiaomi MI UI

Battery

Capacity:

4000 mAh
3100 mAh
5020 mAh

Type:

Li - Polymer, Not user replaceable
Li - Polymer, Not user replaceable
Li - Polymer, Not user replaceable

Battery life test results:

Charging:

Fast charging
Samsung Adaptive Fast Charging
Fast charging, Reverse charging

Max charge speed:

Wired: 18.0W

Camera

Rear:

Quad camera
Dual camera
Quad camera

Main camera:

48 MP (PDAF)
16 MP (PDAF)
48 MP (PDAF)

Specifications:

Aperture size: F1.8; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm
Aperture size: F1.7; Focal length: 27 mm; Sensor size: 1/2.8"; Pixel size: 1.12 μm
Aperture size: F1.8; Sensor size: 1/2"; Pixel size: 0.8 μm

Second camera:

8 MP (Ultra-wide)
5 MP (Ultra-wide)
8 MP (Ultra-wide)

Specifications:

Aperture size: F2.2; Focal Length: 13 mm; Pixel size: 1.12 μm
Aperture size: F2.2; Focal Length: 13 mm; Sensor size: 1/5"; Pixel size: 1.12 μm
Aperture size: F2.2; Sensor size: 1/4"; Pixel size: 1.2 μm

Third camera:

2 MP (Depth information)
2 MP (Macro, Autofocus)

Specifications:

Aperture size: F2.4; Pixel size: 1.75 μm
Aperture size: F2.4; Pixel size: 1.75 μm

Fourth camera:

2 MP (Macro)
2 MP

Specifications:

Aperture size: F2.4; Pixel size: 1.75 μm
Aperture size: F2.4; Sensor size: 1/5"; Pixel size: 1.7 μm

Video recording:

3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (240 fps)
1920x1080 (Full HD) (30 fps)
1920x1080 (Full HD) (30 fps), 1280x720 (HD) (120 fps)

Features:

EIS
Hyperlapse, Video calling, Video sharing

Front:

13 MP
25 MP
13 MP (HDR)

Video capture:

1920x1080 (Full HD)
1920x1080 (Full HD)
1920x1080 (Full HD)

Design

Dimensions:

6.34 x 2.97 x 0.34 inches (161.15 x 75.4 x 8.6 mm)
5.69 x 2.72 x 0.31 inches (144.4 x 69.2 x 7.9 mm)
6.39 x 3.04 x 0.35 inches (162.3 x 77.2 x 8.9 mm)

Weight:

7.05 oz (199.8 g)
4.94 oz (140.0 g)
7.02 oz (199.0 g)

Materials:

Back: Glass (Corning Gorilla Glass 5); Frame: Plastic
Back: Plastic; Frame: Plastic
Frame: Plastic

Resistance:

Splash
Splash

Biometrics:

Fingerprint (touch)
2D Face unlock, Fingerprint (touch)
Fingerprint (touch)

Keys:

Right: Volume control, Lock/Unlock key
Right: Volume control, Lock/Unlock key
Right: Volume control, Lock/Unlock key

Colors:

Moonlight white, Neptune blue, Space black
Black, Coral, Blue, White
Forest green, Polar white, Midnight gray

Cellular

LTE (FDD):

Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 20(800 DD), 28(700 APT)
Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD)
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 20(800 DD), 28(700 APT)

LTE (TDD):

Bands 38(2600), 40(2300)
Bands 38(2600), 40(2300), 41(2600+)
Bands 38(2600), 40(2300), 41(2600+)

UMTS:

Bands 5(850), 8(900), 4(1700/2100), 2(1900), 1(2100)
Bands 1(2100), 2(1900), 5(850), 8(900)
Bands 5(850), 8(900), 4(1700/2100), 2(1900), 1(2100)

Data Speed:

LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
LTE-A Cat 12/13 (600/150 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s

Dual SIM:

Yes
Yes
Yes

SIM type:

Nano SIM
Nano SIM
Nano SIM

VoLTE:

Yes
Yes

Multimedia

Headphones:

3.5mm jack
3.5mm jack
3.5mm jack

Speakers:

Earpiece, Loudspeaker
Earpiece, Loudspeaker
Earpiece, Loudspeaker

Features:

Dolby Atmos, Album art cover, Background playback

Screen mirroring:

Wireless screen share
Wireless screen share
Wireless screen share

Radio:

FM
FM

Additional microphone(s):

for Noise cancellation
for Noise cancellation

Connectivity & Features

Bluetooth:

4.2
5.0
5.0

Wi-Fi:

802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot

USB:

Type-C (reversible), USB 2.0
Type-C (reversible), USB 2.0
Type-C (reversible), USB 2.0

Features:

Charging, OTG
Charging, Mass storage device
Charging

Location:

GPS, A-GPS, Glonass, BeiDou, Cell ID, Wi-Fi positioning
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning

Sensors:

Accelerometer, Gyroscope, Compass
Accelerometer, Gyroscope, Compass, Hall (for flip covers)
Accelerometer, Gyroscope, Compass

Other:

NFC, Infrared
NFC, ANT+, VoIP, Tethering, Computer sync, OTA sync
NFC, Infrared

Regulatory Approval

FCC approval:

Date approved:

Mar 08, 2019

FCC ID value:

A3LSMA405FN link

Measured SAR:

Head:

0.51 W/kg

Body:

0.46 W/kg

Simultaneous Transmission:

1.02 W/kg

Wireless Router:

0.61 W/kg

Buyers information

In The Box:

Power adapter, USB Type-C cable, Removal tool for SIM card, User guide, Warranty card
22.5W Charger, Simple protective cover, USB Type-C cable, SIM eject tool, User guide, Warranty card

Availability

Officially announced:

Apr 10, 2019
Apr 30, 2020
FCC OKs Cingular\'s purchase of AT&T Wireless