Compare Redmi Note 8 2021 vs Redmi Note 9T vs Redmi K40
Connectivity
Ports
USB-C 2.0, 3.5mm headphone
USB-C + 3.5mm headphone jack
USB-C
Wireless Connectivity
IR, WiFi 5, Bluetooth 5.2
NFC, IR blaster, Bluetooth, WiFi
WiFi 6, Bluetooth 5.1
Construction
Battery | Capacity
4000 mAh (typ)
5000 mAh
4520 mAh
Camera | Front
13 MP, f/2.0, 1/3.1", 1.12µm
13MP, f/2.25
20MP
Camera | Rear
48MP main camera 1/2" sensor, f/1.79, AF + 2MP depth sensor, f/2.4 + 2MP macro camera, f/2.4
Camera | Rear | Depth
2 MP, f/2.4
Camera | Rear | Macro
2 MP, f/2.4
Camera | Rear | Telephoto
5MP
Camera | Rear | Ultra-Wide
8 MP, f/2.2, 120˚, 1/4.0", 1.12µm
8MP
Camera | Rear | Wide
48 MP, f/1.8, 26mm, 1/2.0", 0.8µm, PDAF
48MP, Sony IMX582, f/1.79
Colors
Neptune Blue, Moonlight White, Space Black
Nightfall Black, Daybreak Purple
Glossy Black, Icy White, and Dreamland
Material
Gorilla Glass 5 front and back, plastic frame
Corning️ Gorilla️ Glass 5 front / Unibody polycarbonate back
Corning Gorrila Glass 5
Speakers
Super linear speaker
Dual speakers
Dual speakers
Dimensions
Size | Depth
8.35 mm / 0.33"
9.05 mm
7.8 mm
Size | Height
158.3 mm / 6.23"
161.96 mm
163.7 mm
Size | Width
75.3 mm / 2.96"
77.25 mm
76.4 mm
Weight
190 g / 6.7oz
199 g
196 g
Display
Aspect Ratio
19.5:9
20:9
Brightness
500 nits
450 nits (typ)
900 nits (typ) / 1300 nits (max)
Contrast Ratio
5,000,000:1 (typical)
Display Color Depth
10-bit
Display Diagonal
6.3 inch
6.53 inch
6.67 inch
Display Type
IPS
DotDisplay
Samsung E4 AMOLED (OLED)
Gamut
84% NTSC
100% DCI-P3
Pixel Density
409 ppi
Refresh Rate
60 Hz
120 Hz
Resolution
FHD+ 2340×1080
FHD+, (2340×1080)
FHD+ 2400x1080
Function
Audio
Hi-Res Audio certification
Dolby Atmos
Bluetooth Codecs
AAC / LDAC / LHDC
Bluetooth Profiles
A2DP
Chipset
MediaTek Helio G85, 12nm manufacturing process
Qualcomm Snapdragon 870
Fast Charging
18W fast charge
18W wired fast charging
55W wired turbo charging
GPS
GPS, A-GPS, GLONASS, GALILEO, BDS
GPS: L1+L5 / Galileo: E1+E5a / GLONASS: G1 / Beidou
Graphics
Mali-G52 MP2 GPU
Mali-G57 GPU
Qualcomm Adreno 650 GPU
HDR
HDR10+
Operating System
Android 11, MIUI 12.5
MIUI 12 based on Android 10
MIUI 12, Android 11
Processor
Octa-core (2x2.0 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55)
MediaTek Dimensity 800U
Qualcomm Kryo585, 8-core
SIM
2x Nano 4G LTE
Dual SIM, dual 5G standby
Dual nano 5G
Security
Side-mounted fingerprint sensor + AI Face Unlock
Side-mounted fingerprint sensor
Sensor
Fingerprint, accelerometer, gyro, proximity, compass
Touch Screen
360Hz touch sampling rate
Tuner
FM radio
Video Recording
FHD @ 30fps
4K 30fps, FHD 960fps
Performance
Charging Time
52min to 100%
Memory | Capacity
4 GB
4 GB
6, 8, or 12 GB
Memory | Type
LPDDR4X
LPDDR4X
LPDDR5 5500Mbps
Power Supply
33 W
Storage
64 or 128 GB eMMC 5.1 storage + microSD
64GB UFS 2.1 or 128GB UFS2.2 + up to 256GB microSD
128 or 256 GB UFS 3.1
Production
Availability
2021-01-09
Debut
2021-05-25
2021-01-08
2021-02-25
Made In
China
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