Xiaomi Redmi K40
$264.59
Overview
Xiaomi Redmi K40 is a mid-range Android smartphone released in 2021 with a 6.67-inch Super AMOLED, Snapdragon 870 chipset, 48 main camera, and 4520 mAh battery.
The device runs HyperOS with features like Leica partnership. Priced at $264.59, it targets users seeking mid-range performance.
Specifications of Xiaomi Redmi K40
The display of Xiaomi Redmi K40 measures 6.67 inches with Super AMOLED technology and 120Hz refresh rate. Peak brightness reaches 1300 nits for excellent outdoor visibility. The screen renders at 1080x2400 pixels resolution.
The camera system of Xiaomi Redmi K40 features 3 rear cameras: 48 main, 8MP ultrawide, 8MP telephoto. Optical zoom reaches 2x for detailed distant shots. Video recording supports up to 2160p.
The battery of Xiaomi Redmi K40 has 4520mAh capacity with 33 wired charging. A full charge takes approximately 52 min minutes.
The performance of Xiaomi Redmi K40 is powered by the Snapdragon 870 chipset with Adreno 650 GPU.
The memory of Xiaomi Redmi K40 offers 12GB RAM with 128GB storage options. RAM uses LPDDR5 technology. Storage is 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM, 256GB 12GB RAM. Storage is not expandable.
The connectivity of Xiaomi Redmi K40 includes 5G support, Wi-Fi Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct, and Bluetooth 5.1. NFC is supported for contactless payments.
The build of Xiaomi Redmi K40 weighs 196g with Aluminum frame and Glossy back. Dimensions measure 163.7 x 76.4 x 7.8 mm.
The software of Xiaomi Redmi K40 runs Android 11, MIUI 12 with MIUI. Software support extends 2 years through 2028.
Compare Xiaomi Redmi K40
Frequently Asked Questions about Xiaomi Redmi K40
Yes, Xiaomi Redmi K40 is good for photography with its 48 camera. It handles everyday photography well with solid detail and color accuracy.
Yes, Xiaomi Redmi K40 is excellent for gaming with its Snapdragon 870 chipset and 120Hz display. It handles demanding games at high settings with smooth frame rates.
Xiaomi Redmi K40 receives 2 years of updates through 2028. Consider this when planning long-term device usage.
Yes, Xiaomi Redmi K40 supports 5G connectivity with both Sub-6GHz and mmWave bands for maximum network compatibility and fastest speeds. It works with major 5G carriers globally.
Xiaomi Redmi K40 has a 4520mAh battery. This provides full-day battery life with typical usage patterns.
Xiaomi Redmi K40 at $264.59 is a mid-range device offering Snapdragon 870. It's worth buying if you prioritize balanced performance and value.
Xiaomi Redmi K40 supports 33 wired charging with full charge in approximately 52 min minutes.
Xiaomi Redmi K40 is available in 128GB storage options. Storage is not expandable, so choose your capacity based on your needs.
Xiaomi Redmi K40 has a 6.67-inch Super AMOLED with 120Hz refresh rate and 1300 nits peak brightness. HDR support includes HDR10+.
Xiaomi Redmi K40 in Category Rankings
See how Xiaomi Redmi K40 ranks in these categories:
Verdict
The Xiaomi Redmi K40 delivers solid value for budget-conscious users who need reliable performance. The phone excels in versatile camera system, smooth 120Hz display. Select this phone for reliable daily use, if you seek good value without compromising on essential features.
Key Specifications
Display
6.67"
Main Camera
48
Chipset
Snapdragon 870
Full Specifications
Network
| Technology | GSM / CDMA / HSPA / CDMA2000 / LTE / 5G |
| 2G Bands | GSM / |
| 3G Bands | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 |
| 4G LTE Bands | LTE / |
| 5G Sub-6 Bands | 5G |
| 5G mmWave Bands | |
| Speed | N/A |
| Carrier Aggregation | 4x4 MIMO |
| SIM | Nano-SIM |
| Dual SIM Mode | Dual SIM |
| eSIM Support | |
| VoLTE Support | N/A |
| VoWiFi | N/A |
| NR CA Support | 2CC |
Launch
| Announced | 2021 |
| Status | available |
| Availability | N/A |
| Model Variants | N/A |
| Launch Price | $264.59 |
Body & Design
| Dimensions (mm) | 163.7 x 76.4 x 7.8 mm |
| Weight (g) | 196 |
| Build Materials | Aluminum frame, Glass back |
| Frame | Aluminum |
| Back Finish | Glossy |
| Colors | ["Black", "White", "Aurora"] |
| IP Rating | N/A |
| Rugged Certifications | N/A |
| Ingress Gaskets | N/A |
| Form Factor | Bar |
| Hinge Type | N/A |
| Folded Dimensions | N/A |
| Thermal Solution | Graphite |
| Notification/Alert | |
| Haptics | Linear |
Display
| Panel Type | Super AMOLED |
| Size (inches) | 6.67 |
| Resolution (px) | 1080x2400 pixels |
| Aspect Ratio | 9:20 |
| Pixel Density (ppi) | 395 |
| Screen-to-body Ratio (%) | 85.9 |
| Refresh Rate (Hz) | 120 |
| Adaptive Refresh Rate | |
| Touch Sampling Rate (Hz) | 480 |
| Peak Brightness (nits) | 1300 |
| HDR Standards | HDR10+ |
| Color Gamut | 100% DCI-P3 |
| Color Depth | 10 |
| PWM Dimming (Hz) | 1920 |
| Glass Protection | Corning Gorilla Glass v5 |
| Oleophobic Coating | N/A |
| Curvature | Flat |
| Always-on Display | |
| Display Driver IC | N/A |
| Cover Display | N/A |
Platform (SoC)
| OS at Launch | Android 11, MIUI 12 |
| Update Policy | 2 years |
| Chipset | Snapdragon 870 |
| CPU | Octa-core (1x3.2 GHz Kryo 585 & 3x2.42 GHz Kryo 585 & 4x1.80 GHz Kryo 585) |
| GPU | Adreno 650 |
| NPU/AI TOPs | 15 TOPS |
| ISP Features | Spectra 480 |
| Modem | Snapdragon X55 |
| Wi-Fi/Bluetooth Chip | N/A |
| Throttling Behavior | N/A |
| Geekbench Single-Core | N/A |
| Geekbench Multi-Core | N/A |
| AnTuTu Score | N/A |
| 3DMark Scores | N/A |
Memory & Storage
| RAM | 12GB |
| RAM Type | LPDDR5 |
| Storage | 128GB |
| Storage Type | 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM, 256GB 12GB RAM |
| Storage Speed | UFS 3.1 |
| Expandable Storage | |
| Slot Type | N/A |
| USB OTG | |
| Filesystem Encryption | F2FS |
Main Camera System
| Rear Cameras | 3 |
| Main Sensor | 48 |
| Main Sensor Size | 1/2.0" |
| Main Sensor Model | Sony Exmor-RS IMX582 |
| Main Lens | f/1.8, 26mm |
| OIS | |
| Autofocus | PDAF |
| Pixel Binning | 0.8µm |
| Ultrawide | 8MP, FOV: 119° |
| Telephoto | 8MP, 2x optical zoom |
| Macro | 5 |
| Depth/ToF/LiDAR | |
| Flicker/Color Sensors | N/A |
| Flash | LED |
| Video Resolution | 2160p |
| HDR/Dolby Vision Video | |
| Video Codecs | H.264, H.265, HEVC |
| Slow Motion | 960 |
| Video Stabilization | |
| Night Mode Features | |
| RAW/Pro Controls | N/A |
Selfie Camera
| Resolution | 20 |
| Sensor Size | 1/3.06" |
| Aperture | f/2.5 |
| AF/OIS | |
| Secondary Front Cam | |
| Front Flash | |
| Video | 1080p@30fps |
| HDR/Dolby Vision | N/A |
| Face Unlock | 2D |
Audio
| Loudspeakers | Yes, with stereo speakers |
| 3.5mm Jack | |
| Hi-Res Audio | |
| Spatial Audio / Dolby Atmos | |
| Microphones | 2 |
| Bluetooth Codecs | AAC, LDAC, aptX HD |
| DAC/Amp | Cirrus Logic CS43131 |
Connectivity
| Wi-Fi | Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct |
| Wi-Fi Features | Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct |
| Bluetooth | 5.1 |
| NFC | |
| IR Blaster | |
| UWB | N/A |
| Positioning | GPS (L1+L5), GLONASS (G1), BDS (B1I+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC |
| Dual-Band GNSS | |
| FM Radio | |
| USB | USB Type-C 2.0 |
| Display Out | |
| eSIM Capacity |
Sensors
| Fingerprint Sensor | Fingerprint (Side-Mounted) |
| 3D Face ID | N/A |
| Accelerometer | |
| Gyroscope | |
| Magnetometer | |
| Proximity Sensor | |
| Ambient Light | |
| Barometer | |
| Thermo/Hygrometer | N/A |
| UV Sensor | N/A |
| Hall Sensor | |
| Color Temp Sensor | |
| Health Sensors | Heart rate, SpO2 |
| Satellite SOS |
Battery & Charging
| Capacity (mAh) | 4520 |
| Type | Li-Po |
| Removable | |
| Endurance Rating | N/A |
| Wired Charging | 33 |
| Wired Standard | PD3.0 |
| 0-50% Time (mins) | 25 min |
| Full Charge Time | 52 min |
| Wireless Charging | N/A |
| Wireless Standard | N/A |
| Reverse Wireless | N/A |
| Reverse Wired | |
| Charger in Box | 33 |
| Battery Health Features | Battery Health 2.0 |
Software
| OS at Launch | Android 11, MIUI 12 |
| Update Window | 2 years |
| UI Skin / Launcher | MIUI |
| Feature Drops | N/A |
| App Cloning | N/A |
| Game Mode | |
| Privacy Features | App Lock, Private Space |
| Accessibility | screen reader, magnification |
| Satellite Messaging UI |
Miscellaneous
| In-Box Contents | Phone, Charger, Cable, SIM tool, Case, Manual |
| Recycled Materials (%) | N/A |
| Repairability Score | N/A |
| Warranty | N/A |
Reviews & Ratings
186 ratings
Showing 3 of 186 reviews
Alex R.
2 weeks ago
Absolutely love the camera on this phone! The zoom is incredible and the photos are so crisp. Battery life is also a huge plus.
Ben C.
1 month ago
Great performance and beautiful display. My only complaint is that it feels a bit heavy, but you get used to it. Solid phone overall.
Chloe D.
3 months ago
The best phone I've ever owned. It's fast, the software is clean, and the build quality is top-notch. Highly recommend!
Xiaomi Redmi K40 Review: A Flagship Worth Considering
Our comprehensive review of the Xiaomi Redmi K40 covers display quality, camera performance, battery life, and overall value. This flagship delivers on its promises.
- + Excellent Super AMOLED display with 120Hz refresh rate
- + Powerful Snapdragon 870 chipset for smooth performance
- - Battery life could be better
- - No wireless charging