Compare Redmi K40 vs Redmi K40 Pro vs Xiaomi MIX 4
Connectivity
Ports
USB-C
USB-C
USB-C
Wireless Connectivity
WiFi 6, Bluetooth 5.1
WiFi 6E, Bluetooth 5.2, NFC, IR blaster
WiFi 6E, Bluetooth 5.2, UWB point-to-connect, Multifunctional NFC, IR Blaster
Construction
Battery | Capacity
4520 mAh
4520 mAh
4500 mAh
Camera | Front
20MP
20MP
20MP CUP camera, 1.6μm 4-in-1 Super Pixel
Camera | Rear | Telephoto
5MP
5MP
8MP, 5X optical zoom, 50x digital zoom, OIS
Camera | Rear | Ultra-Wide
8MP
8MP, f/2.2
13MP, free-form lens, FOV 120°, 6P lens
Camera | Rear | Wide
48MP, Sony IMX582, f/1.79
64MP, Sony IMX686, f/1.89
108MP, 1/1.33″ HMX sensor, 1.6μm 4-in-1 Super Pixel, OIS, 7P lens
Colors
Glossy Black, Icy White, and Dreamland
Glossy Black, Icy White, and Dreamland
Ceramic Gray, Ceramic White, Ceramic Black
Material
Corning Gorrila Glass 5
Corning Gorrila Glass 5
Corning Gorilla Glass Victus front
Speakers
Dual speakers
Dual speakers
Dual speakers, SOUND BY Harman Kardon, Hi-Res Audio certification
Dimensions
Size | Depth
7.8 mm
7.8 mm
8 mm / 0.31"
Size | Height
163.7 mm
163.7 mm
162.6 mm / 6.40"
Size | Width
76.4 mm
76.4 mm
75.4 mm / 2.97"
Weight
196 g
196 g
225 g / 7.94 oz
Display
Aspect Ratio
20:9
20:9
20:9
Brightness
900 nits (typ) / 1300 nits (max)
900 nits (typ) / 1300 nits (max)
800 nits
Contrast Ratio
5,000,000:1 (typical)
5,000,000:1 (typical)
5,000,000:1 (typical)
Display Color Depth
10-bit
10-bit
10-bit (1.07B colors)
Display Diagonal
6.67 inch
6.67 inch
6.67 inch
Display Type
Samsung E4 AMOLED (OLED)
Samsung E4 AMOLED (OLED)
3D curved AMOLED (OLED)
Gamut
100% DCI-P3
100% DCI-P3
100% DCI-P3
Refresh Rate
120 Hz
120 Hz
120 Hz
Resolution
FHD+ 2400x1080
FHD+ 2400x1080
1080 x 2400
Function
Audio
Dolby Atmos
Dolby Atmos
Hi-Res Audio certification
Bluetooth Codecs
AAC / LDAC / LHDC
AAC / LDAC / LHDC
AAC/LDAC/LHDC
Chipset
Qualcomm Snapdragon 870
Qualcomm Snapdragon 888
Qualcomm Snapdragon 888+
Fast Charging
55W wired turbo charging
55W wired turbo charging
120W wired charging: 21mins to 100% in default mode, 15mins to 100% in Boost Mode
GPS
GPS: L1+L5 / Galileo: E1+E5a / GLONASS: G1 / Beidou
GPS: L1+L5 / Galileo: E1+E5a / GLONASS: G1 / Beidou
GPS: L1+L5 / Galileo: E1+E5a / GLONASS: G1 / Beidou
Graphics
Qualcomm Adreno 650 GPU
Qualcomm Adreno 660 GPU
Adreno 660
HDR
HDR10+
HDR10+
HDR10+, Dolby Vision
Operating System
MIUI 12, Android 11
MIUI 12, Android 11
MIUI 12, Android 11
Processor
Qualcomm Kryo585, 8-core
Qualcomm Kryo 680, 8-core
Octa-core (1x2.99 GHz Kryo 680 & 3x2.42 GHz Kryo 680 & 4x1.80 GHz Kryo 680)
SIM
Dual nano 5G
Dual nano 5G
Dual Nano SIM, 5G
Security
Side-mounted fingerprint sensor
Side-mounted fingerprint sensor
Sensor
Fingerprint (under display, optical), accelerometer, gyro, proximity, compass, color spectrum
Touch Screen
360Hz touch sampling rate
360Hz touch sampling rate
480Hz touch sampling rate
Video Recording
4K 30fps, FHD 960fps
8K 30fps / 4K 60fps / FHD 960fps
Weather Resistance
IP53
Wireless Charging
50W wireless charging: 45min to 100% in default mode, 28min to 100% in Boost Mode
Performance
Charging Time
52min to 100%
52min to 100%
Memory | Capacity
6, 8, or 12 GB
6 or 8 GB
8 or 12 GB
Memory | Type
LPDDR5 5500Mbps
LPDDR5 6400Mbps
LPDDR5 6400Mbps
Power Supply
33 W
33 W
Storage
128 or 256 GB UFS 3.1
128 or 256 GB UFS 3.1
128, 256, or 512 GB UFS 3.1
Production
Debut
2021-02-25
2021-02-25
2021-08-10
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