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- Black
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- Aurora
- Multicolor
- 5 colours
Xiaomi
8 GB / 128 GB / China · Launched March 2021
Overview
NeoScore
6.0
#1680 of 6247
- Design & display
- 7.4
- Performance & hardware
- 6.4
- Camera
- 4.9
- Connectivity
- 6.9
- Battery & charging
- 4.9
Strengths
- The display's 1300-nit peak brightness is among the highest of its time.
- The display's 120 Hz refresh rate is higher than that of most phones of its time.
- Its AnTuTu result of 802,870 is better than that of most phones launched around the same time.
Weak points
- The rear main camera's 1/2.96-inch sensor is smaller than that of most phones launched around the same time.
- Display
- 6.67″Super AMOLED1,080 × 2,400 px120 Hz
- Design
- 196 g76.4 mm163.7 mm7.8 mm
- Performance
- Qualcomm Snapdragon 870Octa-Core12 GB RAM128 GB / 256 GB
- AnTuTu
- 802,870Better than 82% of phones
- Battery
- 4,520 mAh33 W
- Cameras
- 48 Mpx · f/1.88 Mpx · f/2.25 Mpx · f/2.4selfie 20 Mpx · f/2.5
- Network
- 5G4G3G2G
- Software
- Android 11
Editorial report
Xiaomi Redmi K40 8 GB / 128 GB / China technical sheet
The Xiaomi Redmi K40 suits buyers looking for a standout display and capable hardware, but its rear main camera has a smaller sensor than most phones launched around the same time, and Google Services are absent. This version has 6 GB / 128 GB; the phone is also sold in configurations up to 12 GB / 256 GB. That broader range gives buyers other memory options without changing the specifications of this version.
The 6.67-inch Super AMOLED display pairs a 120 Hz refresh rate, higher than that of most phones of its time, with 1300-nit peak brightness, among the highest of its era. Its 7.8 mm thickness is also among the lowest. The AnTuTu result of 802,870 is better than that of most phones launched around the same time. The rear camera setup includes three cameras, with ultrawide and macro options; the main camera is 48 MP, but its 1/2.96-inch sensor is smaller than those in most phones of its time. The 4,520 mAh battery has typical capacity, while 33 W charging is faster than that of most contemporaries.
Overall connectivity is among the best of its time, with 5G, Wi-Fi 6, NFC, and dual Nano-SIM support. Android 11 and the lack of Google Services matter to anyone who relies on those apps. Its overall NeoScore is 6.0. The Redmi K40’s strongest case is its screen, hardware, and connectivity; it is a less natural fit for buyers who prioritize a larger main camera sensor or need Google Services.
Technical index
NeoScore
NeoScore is NeoTeo's technical index: it weighs each phone's verified specifications and compares them with those of the phones of its time.
6.03
/10
Prices in United States
Selected variant
8 GB / 128 GB / China
Design & display
7.4
- Display Technology Super AMOLED
- 8.7
- Display Refresh Rate 120 Hz
- 9.0
- Display Pixel Density 395 ppi
- 8.3
- Peak Display Brightness 1,300 nits
- 8.8
- Display Features Gorilla Glass 5, HDR10+, Hole-Punch Notch, DCI-P3, Capacitive Touch, Multi-Touch, Frameless, Scratch Resistant, Always-On Display
- 5.5
- Weight 196 g
- 6.4
- Resistance Features IP53
- 2.0
- Usable Surface 85.9 %
- 8.3
- Body Thickness 7.8 mm
- 8.4
Performance & hardware
6.4
- AnTuTu Score 802,870
- 4.0
- RAM Capacity 12 GB
- 7.1
- Storage Type UFS 3.1
- 7.5
- Processor Process Size 7 nm
- 6.0
- Maximum Storage Capacity 256 GB
- 5.6
- Maximum CPU Clock 3.2 GHz
- 8.7
- RAM Type LPDDR5
- 8.0
Camera
4.9
- Sensor Size 1/2.96″
- 3.1
- Aperture f/1.8
- 8.0
- Optical Image Stabilization No
- 2.0
- Resolution 48 Mpx
- 8.0
- Camera Features Color Spectrum Sensor, LED Flash, HDR, Panorama, 4K Video, Digital Zoom, Triple Camera, Digital Image Stabilization, Autofocus, Touch Focus, Manual Focus, Continuous Shooting, Geotagging, Face Detection, White Balance Settings, ISO Settings, Exposure Compensation, Scene Mode, Self-Timer, Burst Mode, Continuous Autofocus, Laser Autofocus, Manual Exposure, Manual ISO, Manual White Balance, Time-Lapse, Phase-Detection Autofocus, Macro Camera
- 8.0
Connectivity
6.9
- Connectivity Features Infrared, NFC, USB Type-C, USB OTG, Computer Sync, OTA Sync, Tethering, VoLTE, USB Charging, USB Mass Storage
- 3.0
- Cellular Bands 2G GSM 850, 2G GSM 900, 2G GSM 1800, 2G GSM 1900, 2G CDMA BC0, 2G CDMA B2, 2G CDMA B3, 2G CDMA B5, 2G CDMA B8, 3G UMTS B1, 3G UMTS B2, 3G UMTS B3, 3G UMTS B4, 3G UMTS B5, 3G UMTS B6, 3G UMTS B8, 3G UMTS B19, 3G UMTS 1700 AWS, 4G LTE B1, 4G LTE B2, 4G LTE B3, 4G LTE B4, 4G LTE B5, 4G LTE B7, 4G LTE B8, 4G LTE B18, 4G LTE B19, 4G LTE B26, LTE B28, 4G LTE B28A, 4G LTE B34, 4G LTE B38, 4G LTE B39, 4G LTE B40, 4G LTE B41, 4G LTE B42, 5G NR n1, 5G NR n3, 5G NR n28a, 5G NR n41, 5G NR n77, 5G NR n78, 5G NR n79
- 10.0
- Wi-Fi Standards Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), Wi-Fi 6 (802.11ax)
- 7.5
- Bluetooth Version Bluetooth 5.1
- 6.0
- Navigation Systems GPS, A-GPS, GLONASS, BeiDou, Galileo, QZSS, NavIC
- 10.0
- SIM Configurations Dual Nano-SIM, Dual SIM Dual Standby, Dual SIM
- 7.5
Battery & charging
4.9
- Battery Capacity 4,520 mAh
- 7.5
- Fast Charge Power 33 W
- 5.8
- Battery Features Non-Removable, Rechargeable, Fast Charging, Battery Level Indicator
- 0.0
Tap a point on the chart to see what makes it up.
- Design & display
- 7.43
- Performance & hardware
- 6.43
- Camera
- 4.94
- Connectivity
- 6.9
- Battery & charging
- 4.92
- NeoScore rank
- #1680 / 6247
Xiaomi
Technical specifications
Performance
- Processor Model
- Qualcomm Snapdragon 870
- Processor Process Size
- 7 nm
- Graphics GPU
- Qualcomm Adreno 650
- Storage Type
- UFS 3.1
- Maximum CPU Clock
- 3.2 GHz
- Maximum Storage Capacity
- 256 GB
- AnTuTu Score
- 802,870
- Geekbench 6 Single-Core
- 1,187
- Geekbench 6 Multi-Core
- 3,068
- CPU Description
- Octa-core processor with 1x3.2 GHz, 3x2.42 GHz, and 4x1.80 GHz cores
- Processor Type
- Octa-Core
- 64-Bit Processor
- Yes
- RAM Capacity
- 12 GB
- RAM Type
- LPDDR5
- Expandable Storage
- No
- AnTuTu version
- v10
Design
- Body Colors
- Black, White, Blue, Aurora, Multicolor
- Body Thickness
- 7.8 mm
- Body Width
- 76.4 mm
- Body Height
- 163.7 mm
- Weight
- 196 g
- Usable Surface
- 85.9 %
- Body Materials
- Plastic, Glass, Splash Resistant
- Resistance Features
- IP53
- Foldable
- No
- Rugged Build
- No
Battery
- Battery Capacity
- 4,520 mAh
- Battery Type
- Li-Polymer
- Fast Charge Power
- 33 W
- Battery Features
- Non-Removable, Rechargeable, Fast Charging, Battery Level Indicator
Display
- Display Aspect Ratio
- 20:9
- Display Technology
- Super AMOLED
- Peak Display Brightness
- 1,300 nits
- Display Diagonal
- 6.67″
- Display Horizontal Resolution
- 1,080 px
- Display Vertical Resolution
- 2,400 px
- Display Pixel Density
- 395 ppi
- Display Refresh Rate
- 120 Hz
- Touch Sampling Rate
- 360 Hz
- Display Contrast Ratio
- 5,000,000 :1
- Display Features
- Gorilla Glass 5, HDR10+, Hole-Punch Notch, DCI-P3, Capacitive Touch, Multi-Touch, Frameless, Scratch Resistant, Always-On Display
- Integrated Projector
- No
Sensors
- Fingerprint Sensor Placement
- Side
Sensor
- Sensor Features
- Fingerprint Sensor, Accelerometer, Gyroscope, Proximity Sensor, Compass, Light Sensor, Cooling System, Virtual Proximity Sensing
Software
- Operating System
- Android 11
- OS Family
- Android
- OS Version
- 11
- Direct OS Updates
- No
- Google Services
- No
Connectivity
- SIM Configurations
- Dual Nano-SIM, Dual SIM Dual Standby, Dual SIM
- Cellular Bands
- 2G GSM 850, 2G GSM 900, 2G GSM 1800, 2G GSM 1900, 2G CDMA BC0, 2G CDMA B2, 2G CDMA B3, 2G CDMA B5, 2G CDMA B8, 3G UMTS B1, 3G UMTS B2, 3G UMTS B3, 3G UMTS B4, 3G UMTS B5, 3G UMTS B6, 3G UMTS B8, 3G UMTS B19, 3G UMTS 1700 AWS, 4G LTE B1, 4G LTE B2, 4G LTE B3, 4G LTE B4, 4G LTE B5, 4G LTE B7, 4G LTE B8, 4G LTE B18, 4G LTE B19, 4G LTE B26, LTE B28, 4G LTE B28A, 4G LTE B34, 4G LTE B38, 4G LTE B39, 4G LTE B40, 4G LTE B41, 4G LTE B42, 5G NR n1, 5G NR n3, 5G NR n28a, 5G NR n41, 5G NR n77, 5G NR n78, 5G NR n79
- Cellular Technologies
- GSM, CDMA, HSPA, UMTS, CDMA2000, LTE, 5G
- Wi-Fi Standards
- Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), Wi-Fi 6 (802.11ax)
- Wi-Fi Features
- Dual Band, Wi-Fi Hotspot, Wi-Fi Direct, Wi-Fi Display, MIMO
- Bluetooth Version
- Bluetooth 5.1
- Bluetooth Profiles
- A2DP, LE
- Navigation Systems
- GPS, A-GPS, GLONASS, BeiDou, Galileo, QZSS, NavIC
- Connectivity Features
- Infrared, NFC, USB Type-C, USB OTG, Computer Sync, OTA Sync, Tethering, VoLTE, USB Charging, USB Mass Storage
- USB Version
- USB 2.0
- Max. download speed
- 7,500 Mbps
- Max. upload speed
- 3,000 Mbps
Audio
- Microphone Count
- 2
- Audio Features
- Stereo Speakers, Hi-Res Audio, A2DP, LE, Dolby Atmos
Technical
- Model numbers
- M2012K11AC
Redmi K40
Camera system
Every physical camera module is shown separately, with its sensor, lens and capture capabilities.
Redmi K40 rear main camera
- Sensor Model
- Sony IMX582 Exmor RS
- Resolution
- 48 Mpx
- Sensor Type
- CMOS
- Sensor Size
- 1/2.96″
- Pixel Size
- 0.6 µm
- Pixel Binning
- 4 :1
Sensor
- Sensor Model
- Sony IMX582 Exmor RS
- Resolution
- 48 Mpx
- Sensor Type
- CMOS
- Sensor Size
- 1/2.96″
- Pixel Size
- 0.6 µm
- Pixel Binning
- 4 :1
Video
- Video Recording
- 4K at 30 fps, 1080p at 30 fps, 1080p at 60 fps, 1080p at 120 fps, 1080p at 240 fps, 1080p at 960 fps, Gyro-EIS
- Slow Motion Video
- Yes
- Slow Motion Frame Rate
- 960 fps
Lens
- Aperture
- f/1.8
- Optical Image Stabilization
- No
Flash
- Flash Type
- Dual LED
- Flash LED Count
- 2 LEDs
Features
- Camera Features
- Color Spectrum Sensor, LED Flash, HDR, Panorama, 4K Video, Digital Zoom, Triple Camera, Digital Image Stabilization, Autofocus, Touch Focus, Manual Focus, Continuous Shooting, Geotagging, Face Detection, White Balance Settings, ISO Settings, Exposure Compensation, Scene Mode, Self-Timer, Burst Mode, Continuous Autofocus, Laser Autofocus, Manual Exposure, Manual ISO, Manual White Balance, Time-Lapse, Phase-Detection Autofocus, Macro Camera
Redmi K40 rear ultrawide camera
- Sensor Model
- Sony IMX355
- Resolution
- 8 Mpx
- Sensor Type
- CMOS BSI
- Sensor Size
- 1/2.8″
- Pixel Size
- 1.14 µm
- Aperture
- f/2.2
Sensor
- Sensor Model
- Sony IMX355
- Resolution
- 8 Mpx
- Sensor Type
- CMOS BSI
- Sensor Size
- 1/2.8″
- Pixel Size
- 1.14 µm
Lens
- Aperture
- f/2.2
Redmi K40 rear macro camera
- Sensor Model
- Samsung S5K5E9
- Resolution
- 5 Mpx
- Sensor Type
- ISOCELL
- Sensor Size
- 1/5″
- Pixel Size
- 1.12 µm
- Aperture
- f/2.4
Sensor
- Sensor Model
- Samsung S5K5E9
- Resolution
- 5 Mpx
- Sensor Type
- ISOCELL
- Sensor Size
- 1/5″
- Pixel Size
- 1.12 µm
Lens
- Aperture
- f/2.4
Redmi K40 front camera
- Sensor Model
- Samsung S5K3T2
- Resolution
- 20 Mpx
- Sensor Type
- CMOS
- Sensor Size
- 1/3.4″
- Pixel Size
- 0.8 µm
- Pixel Binning
- 4 :1
Sensor
- Sensor Model
- Samsung S5K3T2
- Resolution
- 20 Mpx
- Sensor Type
- CMOS
- Sensor Size
- 1/3.4″
- Pixel Size
- 0.8 µm
- Pixel Binning
- 4 :1
Video
- Video Recording
- 1080p at 30 fps, 720p at 120 fps
Lens
- Aperture
- f/2.5
Features
- Camera Features
- HDR, Front-Facing LED Flash
Product gallery
12Variant details
- Memory
- 8 GB
- Markets
- China
- Storage
- 128 GB
- Market codes
- China
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