Redmi K40

Description

Launch date March 7, 2021
Usage scenarios 5G mobile phone>, 4G mobile phone>, 3G mobile phone>, smart phone>, tablet phone>, camera phone>, music phone>
Body material Glass back cover>
Body color Bright black, clear snow, fantasy, ink feather
Fingerprint recognition Side fingerprint recognition>
Face recognition Support
Appearance
Length 163.7mm
Width 76.4mm
Thickness 7.8mm
Weight 196g
Hardware
CPU model Qualcomm Snapdragon 870 More Qualcomm Snapdragon 870 mobile phones>, mobile phone performance ranking>
CPU frequency 3.2Ghz A77*1+2.4GHz A77*3+1.8GHz A55*4
CPU core number Octa-core>
GPU model Qualcomm Adreno650
RAM capacity 8GB>Game runs smoothly
RAM storage type LPDDR5>
ROM capacity 128GB>26,000 photos 11,000 songs
ROM storage type UFS 3.1>
Memory card does not support capacity expansion>
Factory system kernel Android 11>
Operating system MIUI 12
Vibration motor X-axis linear motor
Speaker Stereo dual speakers
Screen
Screen size 6.67 inches
Screen type Full screen (center hole screen), straight screen>
Screen ratio 20:9
Resolution 2400x1080px
Screen material AMOLED (E4)>
Screen refresh rate 120Hz>
Touch screen type Capacitive screen, multi-touch
Touch sampling rate 360Hz
Screen color True Tone ambient color temperature, 8bit primary color screen
Other screen parameters Sunlight screen 3.0, 2.76mm screen opening
HDR technology HDR 10+>
Contrast ratio 5000000:1
Screen brightness 1300nits peak brightness, 900nits global brightness
Screen technology Corning fifth-generation Gorilla Glass, MEMC motion compensation technology, SGS eye protection certification>
Camera
Total number of cameras 4
Camera name Rear main camera: main camera
Rear ultra-wide-angle lens: ultra-wide-angle lens
Rear telephoto macro lens: telephoto macro lens
Front main camera: main camera
Pixels Rear main camera: 48 million pixels
Rear ultra-wide-angle lens: 8 million pixels
Rear telephoto macro lens: 5 million pixels
Front main camera: 20 million pixels
Aperture f/1.79
Wide angle 119°
Rear camera function 48MP ultra-clear, AI magic clone, front and rear dual view, AI magic kaleidoscope, AI camera, super night scene, document mode, movie lens, ID card copy mode, cute shot, rear beauty-shaping, movie filter, voice subtitles, portrait mode background blur, professional mode, dynamic photo, timed continuous shooting, voice-activated photo, countdown photo, level, reference line front AI camera, front and rear dual view, voice subtitles, voice-activated photo, cute shot, movie filter, portrait mode, 3D beauty makeup, front panorama, front night scene, dynamic photo, timed continuous shooting, full-screen photo, gesture photo
Rear video shooting 4K (3840×2160, 30 frames/second) video recording 1080p (1920×1080, 60 fps, 30 fps) video recording 720p (1280×720, 30 fps) video recording slow motion 1080p (1920×1080, 960 fps, 240 fps, 120 fps) video recording slow motion 720p (1280×720, 960 fps, 240 fps, 120 fps) video recording
Front camera function Screen fill light, countdown photo, AI smart beauty, movie light effect, AI people and scene separation
Front camera video shooting 1080p (1920×1080, 30 fps) video recording 720p (1280×720, 30 fps) video recording slow motion 720p (1280×720, 120 fps) video recording
Flash LED fill light>
Network and connection
Network type 5G>, 4G>, 3G>
Network frequency band 2G: GSM 850/900/1800/1900MHz 2G: CDMA 1X BC0 3G: WCDMA B1/B2/B4/B5/B6/B8/B19 3G: CDMA EVDO BC0 4G: FDD-LTE B1/B2/B3/B4/B5/B7/B8/B18/B19/B26/B28A 4G: TDD-LTE B34/B38/B39/B40/B41/B42 5G: n1/n3/n28A/n41/n77/n78
SIM card type Dual card (Nano SIM card)>
WLAN function Dual-band WiFi, WiFi6 (IEEE 802.11 a/b/g/n/ac/ax), 2×2 MIMO, HE160, 1024 QAM, 8×8 Sounding for MU-MIMO
Positioning and navigation Beidou navigation (B1+B2a), GPS navigation (L1+L5), Galileo navigation (E1+E5a), GLONASS navigation (G1), QZSS navigation (L1+L5), NavIC, A-GPS technology>, A-GLONASS, A-BDS, data network positioning, Wi-Fi network positioning, sensor-assisted positioning
Bluetooth Bluetooth 5.1, support AAC/LDAC/LHDC
NFC Support NFC (after opening the Tianxing Financial Wallet App, double-click the power button to use Xiaomi Bus, Mi Pay, door card, eID, electronic car key and other functions for public transportation, mobile payment, mobile phone door opening and other scenarios)
Infrared function Support
Connection and sharing WLAN hotspot, VoLTE
Body interface USB Type-C interface
Other network parameters Dual-mode 5G
Battery and battery life
Battery type Non-removable battery
Battery capacity 4520mAh large battery
Wired charging 33w (supports QC3+/PD3.0 fast charging protocol)
Functions and services
Sensors Distance sensor, ambient light sensor, acceleration sensor, gyroscope, electronic compass, color temperature sensor, infrared remote control
Audio support Supports MP3/FLAC/APE/AAC/OGG/WAV/WMA/AMR-NB/AMR-WB formats
Video support MP4/MKV/AVI/WMV/WEBM/3GP/ASF and other formats
Image support Supports JPEG/PNG/GIF/BMP and other formats
Mobile phone accessories
Packing list Mobile phone x1 Power adapter x1 Mobile phone protective case x1 Mobile phone protective film (attached) x1 USB Type-C data cable x1 SIM card pin x1 Three-guarantee certificate x1 Instruction manual x1
Warranty information
Warranty policy National joint warranty, enjoy three-guarantee service
Warranty period 1 year
Warranty remarks 1 year for the host, 1 year for the battery, 1 year for the charger

Details From the date of purchase (based on the purchase invoice), if there is a quality problem or failure, you can enjoy return within 7 days, exchange within 15 days, and free warranty within the warranty period of more than 15 days with the quality inspection certificate of the manufacturer’s repair center or special repair point! Note: For users who purchase mobile phone accessories separately, please keep the outer packaging of the accessories and the original invoice intact. If you cannot provide the above certificates, you will not be able to carry out normal accessory warranty or replacement.