Home Electronics & Computing Mobile & Communication Smartphones Xiaomi Redmi K40

Xiaomi Redmi K40

Key Features

Display

6.67 inches

1080×2400 pixels

Camera

48 MP

Memory

6GB, 8GB, 12GB

LPDDR5

Battery

4520 mAh

Li-Poly

Release date

March 2021

Storage

128GB, 256GB

UFS 3.1

Out of stock

What Customers Say

Customers generally praise the Xiaomi Redmi K40 for its excellent performance, fast charging capabilities, and smooth user interface, making it a great choice for gaming and everyday use. However, some users report issues like overheating during intensive tasks and compatibility problems with certain apps, such as Netflix, which can detract from the overall experience.

AI-generated content. May contain errors.

ChoiceWise Review: 71 Out Of 100

Performance

Camera

Battery

Display

TypeSuper AMOLED

Size6.67 inches

Resolution1080×2400 pixels

Refresh rate120 Hz

PPI395

Aspect ratio20:9

Screen-to-body ratio85.9 %

Display featuresCapacitive Touchscreen HDR10+ Multi-touch screen

Max rated brightness1300 nits

Screen protectionCorning Gorilla Glass 5

ChipsetQualcomm Snapdragon 870

CPU cores8

Fabrication Technology7 nm

CPU max frequency3.2 GHz

CPU Architecture64-bit

Microarchitecture1x 3.2 GHz – Cortex-A77 3x 2.42 GHz – Cortex-A77 4x 1.8 GHz – Cortex-A55

Memory typeLPDDR5

GPUQualcomm Adreno 650

RAM6GB, 8GB, 12GB

Storage128GB, 256GB

Storage TypeUFS 3.1

Operating SystemAndroid 11 (Red Velvet Cake)

Matrix48 MP

Video Resolution2160p @ 30 fps 1080p @ 30/60/120/240/960 fps

Video FeaturesGyro-EIS

FeaturesContinuous shooting mode Digital Zoom Exposure Compensation Face Detection High Dynamic Range (HDR) ISO Settings Panorama Touch to focus

Lenses48 MP, ƒ/1.8, 26 mm ( Wide-angle ), 0.8 μm, 1/2.0" Sensor size - PDAF 8 MP, ƒ/2.2, 119° ( Ultra-Wide angle ) 5 MP, ƒ/2.4, 50 mm ( Macro ), 1.12 μm, 1/5.0" Sensor size

FlashLED Flash

Matrix20 MP

Lenses20 MP, ƒ/2.5 ( Wide-angle ), 0.8 μm, 1/3.4" Sensor size

Video Resolution1080p @ 30 fps 720p @ 120 fps

FeaturesHigh Dynamic Range (HDR)

AnnouncedThursday, 25 February 2021

ReleasedThursday, 04 March 2021

Capacity4520 mAh

TypeLi-Poly

Wired charging power33W

Wireless charging supportno

Fast charging supportYes

Browsing10:42 hh:mm

Video watching9:24 hh:mm

Playing games9:13 hh:mm

Height163.7 mm

Width76.4 mm

Thickness7.8 mm

Weight196 g

Resistance certificateno

SIM cardsDual SIM

VoLTE supportYes

Network Type support5G, LTE, HSPA

Network_5G bands5G: n1 (2100), n3 (1800), n28 (700), n41 (2500), n77 (3700), n78 (3500 MHz)

Network_4G bandsLTE: b1 (2100), b2 (1900), b3 (1800), b4 (1700), b5 (850), b7 (2600), b8 (900), b18 (800), b19 (800), b26 (850), b28 (700), b34 (2000), b38 (2600), b39 (1900), b40 (2300), b41 (2500), b42 (3500 MHz)

Network_3G bandsHSPA: 850 / 900 / 1700 / 1900 / 2100 MHz

Network_2G bandsGSM: 850 / 900 / 1800 / 1900 MHzCDMA: 800 MHz

WiFi supportYes ( Wi-Fi 6 )

Bluetooth supportYes, v5.1

USB portsUSB Type-C 2.0, USB On-The-Go,

USB connectivityUSB charging, USB Mass Storage device (UMS)

GPS supportYes

GPS featuresBDS, GPS (L1 & L5), GALILEO, GLONASS, NavIC, QZSS

NFC supportYes

Wi-Fi standards802.11/a/b/g/n/ac/ax

Wi-Fi featuresDual-band, Mobile Hotspot, Wi-Fi Direct

LoudspeakerYes

Headphone jackNo

Radio FMNo

Audio typeStereo speakers,

Expert Opinion

Overall Assessment and Positioning

The Xiaomi Redmi K40 is a high-end smartphone that positions itself strongly in the mid-to-high-end segment of the market. It offers a compelling blend of performance, features, and value, making it a solid choice for users seeking a premium Android experience without breaking the bank. With its sleek design, impressive display, and robust specifications, the Redmi K40 is poised to compete with established flagships from other manufacturers. Its availability in various memory and storage configurations also caters to a wide range of users, making it a versatile option for both casual and power users.

Key Strengths and Standout Features

One of the Redmi K40's key strengths lies in its display, which boasts a high-resolution Super AMOLED panel with a fast 120Hz refresh rate and impressive peak brightness of 1300 nits. The phone's camera system is also noteworthy, featuring a 48MP primary sensor, an 8MP ultra-wide-angle lens, and a 5MP macro lens. The Xiaomi Redmi K40's performance is driven by the Qualcomm Snapdragon 870 chipset, which delivers smooth and efficient performance. Additionally, the phone's 4520mAh battery provides ample power for users, with support for fast charging up to 33W. Other notable features include support for Wi-Fi 6, Bluetooth 5.1, and NFC.

Value Proposition and Who It's Best Suited For

The Xiaomi Redmi K40 offers exceptional value for its price, making it an attractive option for users seeking a high-end smartphone without the premium price tag. It is best suited for users who value performance, camera capabilities, and a premium display experience. Specifically, the Redmi K40 targets users who are looking for a device that can handle demanding tasks such as gaming, video editing, and content creation. Additionally, the phone's affordable price point makes it an attractive option for users who are upgrading from a lower-end device or seeking a reliable daily driver. Overall, the Xiaomi Redmi K40 is a solid choice for users seeking a premium Android experience without breaking the bank.