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Xiaomi Redmi K40
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Battery: Li-Po 4520 mAh
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RAM: 6GB, 8GB, 8GB, 12GB
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Storage: 128GB, 128GB, 256GB, 256GB
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Display: Super AMOLED, 6.67 inches
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Camera: Rear 48 MP+8 MP+5 MP, and Front 20 MP
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OS: Android 11, MIUI 12
Full Specifications
General
| Model | Xiaomi Redmi K40 |
| Announced | 2021, February 25 |
| Released | 2021, March 04 |
| Status | Available |
Price
| Official | 35990 BDT 6GB/128GB Approx. |
Design
| Dimensions The Dimensions section shows the phone’s physical size in Height × Length × Width (H × L × W) format, along with its volume, when available. For flip phones, the dimensions are measured with the flip closed. This information helps users understand the phone’s overall size, thickness, portability, and how comfortably it may fit in the hand or pocket. | 163.7 x 76.4 x 7.8 mm (6.44 x 3.01 x 0.31 in) |
| Weight The Weight section shows the total weight of the phone, usually measured in grams (g). It helps users understand how light or heavy the device feels during everyday use and carrying. For phones with different designs or configurations, the listed weight may vary depending on the materials, battery, and other hardware components. | 196 g (6.91 oz) |
| SIM The SIM section provides details about the phone’s supported SIM configuration, including SIM type, number of SIM slots, and eSIM support, where available. It may specify options such as Nano-SIM, Single SIM, Dual SIM, or Hybrid Dual SIM. This information helps users understand how the phone handles multiple mobile numbers and which SIM format is required. For Dual SIM devices, the section may also indicate whether both SIMs can remain active simultaneously and support mobile network connectivity. |
Dual SIM (Nano-SIM, dual stand-by) |
| Colors |
Black, White, Aurora |
Display Specification
| Display Type The Display Type section identifies the technology used for the phone’s screen, such as IPS LCD, AMOLED, OLED, or LTPO AMOLED. It helps users understand the display’s overall visual quality, including color reproduction, contrast, brightness, viewing experience, and power efficiency. The display type is an important specification when comparing smartphone screens. | Super AMOLED |
| Size The Display Size section shows the diagonal size of the phone’s screen, usually measured in inches. It helps users understand the available viewing area and overall screen experience. A larger display is generally better for watching videos, gaming, and browsing, while a smaller display can offer easier handling and portability. | 6.67 inches, 107.4 cm2 |
| Resolution | 1080 x 2400 pixels, 20:9 ratio |
| Refresh Rate | 120Hz |
| Pixel Density Pixel Density (PPI) is refers to the concentration of pixels on a particular display, measured in pixels per inch (ppi). Pixel density is calculated by dividing the diagonal pixel resolution of a display by its diagonal size, higher pixel density better display quality. | 395 ppi density |
| Display Protection Display Protection => Gorilla Glass is a special alkali-aluminosilicate glass shield with exceptional damage resistance that helps protect mobile displays from scratches, drops, and bumps of everyday use, It is always better to go for a smartphone with Gorilla Glass for that added protection and peace of mind. | Corning Gorilla Glass 5 |
| Features | HDR10+, 1300 nits (peak) |
Storage
| Card Slot The Storage Card Slot section indicates whether the phone supports an external memory card, such as a microSD card, for expanding storage. It shows users whether they can add extra space for apps, photos, videos, and other files beyond the phone’s built-in storage. If the phone does not support a memory card, it will be listed as Not Supported. | No |
| Internal Storage The Internal Storage section shows the built-in storage capacity available on the phone, usually measured in GB. It determines how much space is available for apps, photos, videos, documents, and other files. Phones may come with different storage options, such as 128GB, 256GB, or 512GB, depending on the model and variant. |
128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM, 256GB 12GB RAM UFS 3.1 |
Main Camera
| Camera Setup | Triple |
| Resolution |
48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.2, 119˚ (ultrawide) 5 MP, f/2.4, 50mm (macro), 1/5.0", 1.12µm |
| Features |
LED flash, HDR, panorama |
| Video | 4K@30fps, 1080p@30/60/120/240/960fps, gyro-EIS |
Selfie Camera
| Camera Setup | Single |
| Resolution |
20 MP, f/2.5, (wide), 1/3.4", 0.8µm |
| Video | 1080p@30fps, 720p@120fps |
| Features | HDR |
Platform
| Operating System The Operating System (OS) section shows the software platform that powers the phone and manages its hardware, apps, and system features. It typically includes the OS name and version, such as Android or iOS, and may also mention the manufacturer’s custom user interface. This information helps users understand the phone’s software experience, features, compatibility, and available updates. | Android 11, MIUI 12 |
| Chipset Chipset is a group of integrated circuits designed to perform one or a more dedicated functions, often with real time computing constraints, Popular smartphones are equipped with more advanced embedded chipsets that can do many different tasks depending on their programming. | Qualcomm SM8250-AC Snapdragon 870 5G (7 nm) |
| CPU CPU (Central Processing Unit) mostly known as processors, CPU processes instructions in order to carry out certain functions that make your device operate properly. Processors are often described as the brain of computers, smartphones and tablets, Smartphones and tablets rely on processors to carry out their every task, Processors are an incredibly important factor in selecting any type of computing device, including your smartphone. | Octa-core (1x3.2 GHz Kryo 585 & 3x2.42 GHz Kryo 585 & 4x1.80 GHz Kryo 585) |
| GPU GPU (Graphics Processing Unit) is a single-chip processor designed to rapidly manipulate and alter memory to accelerate the creation of images in a frame buffer intended for output to a display, This includes things such as lighting effects, object transformations, and 3D motion. | Adreno 650 |
Battery
| Battery Type The Battery Type section identifies the technology and design of the phone’s built-in battery, such as Li-Ion (Lithium-Ion) or Li-Po (Lithium-Polymer). It helps users understand the type of battery used to power the device and provides a basic overview of its battery technology. | Li-Poly (Lithium Polymer) |
| Capacity The Battery Capacity section shows the amount of electrical charge the phone’s battery can store, usually measured in mAh (milliampere-hours). A higher capacity generally provides more energy for everyday use, although actual battery life also depends on the display, processor, software, network usage, and other hardware components. | 4520 mAh |
| Removable | No |
| Charging |
33W wired, PD3.0, QC3, 100% in 52 min (advertised) |
| Wireless Charging Wireless Charging (Inductive Charging) uses an electromagnetic field to transfer energy between two objects. This is usually done with a charging station. Energy is sent through an inductive coupling to an electrical device, which can then use that energy to charge batteries or run the device. | No |
Multimedia
| Loudspeaker The Loudspeaker section indicates the type and configuration of the phone’s built-in speakers, such as single or stereo speakers. It helps users understand the device’s audio output for calls, music, videos, gaming, and other multimedia activities. Some phones may also include additional audio features for a better listening experience. | Yes, with stereo speakers |
| Audio Jack The Audio Jack section indicates whether the phone includes a dedicated 3.5mm headphone jack for connecting wired headphones, earphones, or external audio devices. If the phone does not have a traditional audio jack, users may need USB Type-C headphones or an adapter for wired audio. The specification helps users quickly check the phone’s compatibility with their preferred audio accessories. |
No |
| Audio Features | 24-bit/192kHz Hi-Res audio |
Sensors
| Fingerprint | Yes (side-mounted) |
| Other Sensors | accelerometer, gyro, proximity, compass, color spectrum |
Network & Connectivity
| Technology | GSM / CDMA / HSPA / CDMA2000 / LTE / 5G |
| Speed | HSPA, LTE, 5G |
| Wi-fi The Wi-Fi section shows the wireless networking technologies and standards supported by the phone for connecting to the internet and other compatible devices. It may include standards such as Wi-Fi 4, Wi-Fi 5, Wi-Fi 6, Wi-Fi 6E, or Wi-Fi 7, along with features like dual-band, tri-band, Wi-Fi Direct, and hotspot support, where available. This information helps users understand the phone’s wireless connectivity, network compatibility, speed capabilities, and connection features. | Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct |
| Bluetooth The Bluetooth section shows the wireless communication technology and version supported by the phone, such as Bluetooth 5.0, 5.1, 5.2, 5.3, or 5.4. It enables the phone to connect wirelessly with headphones, speakers, smartwatches, keyboards, cars, and other compatible devices. Where available, this section may also mention features such as A2DP, LE, aptX, or other Bluetooth audio and connectivity technologies. | 5.1, A2DP, LE |
| NFC The NFC (Near Field Communication) section indicates whether the phone supports short-range wireless communication between compatible devices. NFC can be used for contactless payments, quick device pairing, data sharing, access cards, and other NFC-enabled services, depending on the phone and region. This specification helps users check whether the device supports convenient tap-to-connect and contactless features. | Yes |
| Positioning |
GPS (L1+L5), GLONASS (G1), BDS (B1I+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC |
| FM Radio | No |
| Infrared port | Yes |
| USB | USB Type-C 2.0, OTG |
| 2G Network The 2G Network section shows whether the phone supports second-generation mobile networks, including GSM, GPRS, and EDGE technologies. It provides basic connectivity for voice calls, SMS, and limited mobile data services where 2G networks are available. |
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 CDMA 800 |
| 3G Network The 3G Network section indicates the phone’s compatibility with third-generation mobile networks, such as UMTS, HSPA, and HSPA+. 3G provides faster mobile data than 2G and supports services such as web browsing, video calling, and multimedia streaming. |
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 CDMA2000 1x |
| 4G Network The 4G Network section shows whether the phone supports fourth-generation mobile networks, primarily LTE technology. 4G offers faster mobile internet speeds, lower latency, and improved performance for browsing, streaming, online gaming, and other data-intensive activities. |
1, 2, 3, 4, 5, 7, 8, 18, 19, 26, 28, 34, 38, 39, 40, 41, 42 |
| 5G Network The 5G Network section indicates the phone’s compatibility with fifth-generation mobile networks. 5G can provide higher data speeds, lower latency, and improved network capacity, supporting faster downloads, high-quality streaming, cloud services, and other demanding mobile applications. |
1, 3, 28, 41, 77, 78 SA/NSA/Sub6 |
About the Xiaomi Redmi K40:
The Xiaomi Redmi K40, released on March 4, 2021, weighs 196g and has a thickness of 7.8mm. It runs on Android 11 with MIUI 12, offering 128GB or 256GB of internal storage with no card slot for expansion. The 6.67-inch Super AMOLED display supports a 120Hz refresh rate, HDR10+, and a peak brightness of 1300 nits with a resolution of 1080×2400 pixels. Powered by the Snapdragon 870 5G chipset and available in 6GB, 8GB, or 12GB RAM variants, the Redmi K40 delivers excellent performance for gaming and multitasking. The triple-camera setup includes a 48 MP main sensor, 8 MP ultrawide, and 5 MP macro lens. The device supports 4K video recording and the 20 MP front camera is perfect for selfies. The 4520mAh battery supports 33W fast charging, reaching 100% in 52 minutes. Available in Black, White, and Aurora, the Redmi K40 is priced at around 280 EUR.
Buying Reasons:
- Super AMOLED display with 120Hz refresh rate and HDR10+ support.
- Snapdragon 870 5G chipset for high performance.
- 48 MP main camera with 4K video recording.
- 4520mAh battery with 33W fast charging.
- Sleek design with Gorilla Glass 5 protection.
Opinions:
The Xiaomi Redmi K40 offers great value for its price with its Snapdragon 870 chipset and 120Hz AMOLED display. The 48 MP camera and 4K video recording make it a solid choice for photography and video enthusiasts. The 4520mAh battery and 33W fast charging ensure long-lasting usage. However, the lack of a 3.5mm headphone jack and expandable storage may be limitations for some users.
Check other Models of Xiaomi:
FAQs about Xiaomi Redmi K40
Q: What is the display size and type of the Redmi K40?
Answer: The Redmi K40 features a 6.67-inch Super AMOLED display with a resolution of 1080 x 2400 pixels, a 20:9 aspect ratio, and a 120Hz refresh rate. It also supports HDR10+ and has a peak brightness of 1300 nits.
Q: What processor powers the Redmi K40?
Answer: The Redmi K40 is powered by the Qualcomm Snapdragon 870 5G chipset, which is an octa-core processor based on a 7nm manufacturing process, featuring one Kryo 585 core clocked at 3.2GHz, three Kryo 585 cores clocked at 2.42GHz, and four Kryo 585 cores clocked at 1.8GHz.
Q: What are the camera specifications of the Redmi K40?
Answer: The Redmi K40 has a triple rear camera setup, consisting of a 48MP primary camera with f/1.8 aperture, an 8MP ultra-wide camera with a 119-degree field of view, and a 5MP macro camera. On the front, it has a 20MP selfie camera with f/2.5 aperture.
Q: How much RAM and storage does the Redmi K40 offer?
Answer: The Redmi K40 is available in four configurations: 6GB RAM + 128GB storage, 8GB RAM + 128GB storage, 8GB RAM + 256GB storage, and 12GB RAM + 256GB storage. It does not have a microSD card slot for expandable storage.
Q: What is the battery capacity and charging speed of the Redmi K40?
Answer: The Redmi K40 is equipped with a 4,520mAh battery that supports 33W wired fast charging, which can charge the device from 0 to 100% in approximately 52 minutes, according to Xiaomi.
Q: Does the Redmi K40 have a headphone jack?
Answer: No, the Redmi K40 does not have a 3.5mm headphone jack for wired audio connectivity.
Q: What Android and MIUI version does the Redmi K40 run?
Answer: The Redmi K40 ships with Android 11 out of the box, with Xiaomi’s custom MIUI 12 skin on top.
Q: Does the Redmi K40 support 5G connectivity?
Answer: Yes, the Redmi K40 is a 5G-enabled smartphone, supporting both SA and NSA 5G modes as well as Sub-6GHz 5G bands.
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