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Xiaomi Redmi K40 Full Specs Pricing and Performance Breakdown

Release Date
2021, March 04
Camera
48MP
Battery
4520mAh
Battery Type
33W
Processor
Snapdragon 870 5G
Screen
6.67"
Storage
128GB/256GB
Ram
6-12GB RAM
Operating System
Android 11, MIUI 12

Design and Build

The Xiaomi Redmi K40 boasts a sleek and sophisticated design that caters to modern aesthetics while offering robust functionality. The device measures 163.7 x 76.4 x 7.8 mm, making it comfortable to hold and use. Its weight, at 196 g, feels balanced and substantial without being cumbersome. The build quality is commendable, incorporating durable materials for longevity. The use of Corning Gorilla Glass 5 on both the front and back ensures enhanced protection against scratches and accidental drops.

Display

One of the standout features of the Redmi K40 is its stunning display. It sports a 6.67-inch Super AMOLED screen with a refresh rate of 120Hz, delivering smooth visuals that enhance the user experience, whether you're scrolling through social media or gaming. The HDR10+ support, combined with a peak brightness of 1300 nits, ensures vibrant color reproduction and excellent visibility even under direct sunlight. The resolution of 1080 x 2400 pixels ensures sharp and clear images, while the 20:9 aspect ratio provides a cinematic viewing experience.

Performance and Software

Under the hood, the Redmi K40 is powered by the Qualcomm Snapdragon 870 5G chipset, which is well-regarded for its performance efficiency. The octa-core processor configuration (1x3.2 GHz Kryo 585 & 3x2.42 GHz Kryo 585 & 4x1.80 GHz Kryo 585) ensures seamless multitasking and smooth operation across various applications. The Adreno 650 GPU enhances gaming performance, providing high-quality graphics with minimal frame drops.

The device runs on Android 11 with Xiaomi's proprietary MIUI 12 skin on top, providing a user-friendly interface packed with feature-rich customizations. MIUI 12 brings several enhancements, including improved animations, dynamic window management, and enhanced privacy controls, making the Redmi K40 both intuitive and secure for daily usage.

Camera Performance

The Redmi K40's camera setup is quite capable, featuring a triple camera system on the back. The primary camera is a 48 MP wide sensor, allowing for detailed and bright photography. It is complemented by an 8 MP ultrawide camera, perfect for capturing expansive landscapes or group photos, and a 5 MP macro camera for close-up shots.

The rear camera system is enhanced with features such as LED flash, HDR, and panorama, and supports video recording up to 4K at 30fps, ensuring flexibility for photography enthusiasts. The 20 MP front-facing camera, equipped with HDR, allows for high-quality selfies and videos, supporting 1080p recording at 30fps and slow-motion capture at 720p@120fps.

Battery Life and Charging

Battery performance is a crucial aspect for any smartphone, and the Redmi K40 does not disappoint. It packs a 4520 mAh Li-Po non-removable battery, offering a decent lifespan capable of lasting through a full day of moderate to heavy use. The 33W fast charging support, advertised to charge the device to 100% in 52 minutes, ensures minimal downtime and keeps you connected throughout the day.

Memory and Storage

Recognizing the diverse needs of users, the Redmi K40 offers multiple configurations. It is available in 128GB/6GB RAM, 128GB/8GB RAM, 256GB/8GB RAM, and 256GB/12GB RAM variants, thereby accommodating a range of storage and performance requirements. However, it is important to note that the device lacks support for expandable storage via a microSD card, so selecting a configuration that meets your storage needs from the outset is recommended.

Connectivity and Additional Features

Connectivity options on the Redmi K40 include dual SIM support, allowing users to manage multiple numbers or networks conveniently. The device also supports a wide range of network technologies, including GSM, CDMA, HSPA, CDMA2000, LTE, and 5G, ensuring excellent coverage and high-speed internet access.

Additional connectivity features include Wi-Fi 802.11 a/b/g/n/ac/6 for fast and reliable internet connections, Bluetooth 5.1 for seamless wireless communication, NFC for convenient contactless transactions, and an infrared port for remote control functionality. The phone also supports various satellite positioning systems, including GPS, GLONASS, BDS, GALILEO, and more, providing accurate and dependable location services.

The absence of a 3.5mm audio jack might be a downside for some users, but the inclusion of stereo speakers ensures impressive audio quality. The side-mounted fingerprint sensor, accelerometer, gyro, proximity sensor, compass, and color spectrum sensor collectively enhance the device's usability and security.

Price and Availability

The Xiaomi Redmi K40 provides an excellent balance between performance, features, and price. It was announced on February 25, 2021, and became available on March 4, 2021. With a starting price of approximately 280 EUR, it presents a compelling option for those seeking a high-performing smartphone at a reasonable cost. The device is available in several color options, including Black, White, and Aurora, allowing users to select a style that best matches their personal taste.

Conclusion

Overall, the Xiaomi Redmi K40 is a well-rounded smartphone that excels in various aspects, from its robust design and excellent display to top-notch performance and battery efficiency. It caters to both regular users and enthusiasts who require reliable performance and a comprehensive feature set. While it lacks expandable storage and a headphone jack, its strengths in other areas make it a competitive offering in the smartphone market.

Key Features of Xiaomi Redmi K40

  • Supports 5G connectivity with multiple bands
  • Stunning 6.67-inch Super AMOLED display with 120Hz refresh rate and HDR10+
  • High peak brightness of 1300 nits, providing clear visibility even in sunlight
  • Corning Gorilla Glass 5 for enhanced screen protection
  • Powered by Qualcomm Snapdragon 870 5G processor for high performance
  • Variety of memory options with up to 256GB internal storage and 12GB RAM
  • Triple rear camera setup led by a 48 MP main sensor
  • Capable of recording 4K video @30fps and slow-motion at various speeds
  • 20 MP front camera for high-quality selfies
  • Equipped with stereo speakers for better audio experience
  • Fast wired charging at 33W, reaching 100% in just 52 minutes
  • Comprehensive connectivity including Wi-Fi 6, Bluetooth 5.1, NFC, and Infrared port
  • Side-mounted fingerprint sensor for quick and easy unlocking
  • Available in multiple colors: Black, White, and Aurora

Xiaomi Redmi K40 Disadvantages

  • No expandable storage via a microSD card slot.
  • Lacks a 3.5mm headphone jack, which could inconvenience users who prefer wired audio.
  • No FM radio feature available.
  • No official water or dust resistance rating.
Network
Technology GSM / CDMA / HSPA / CDMA2000 / LTE / 5G
2G bands GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands 1, 2, 3, 4, 5, 7, 8, 18, 19, 26, 28, 34, 38, 39, 40, 41, 42
5G bands 1, 3, 28, 41, 77, 78 SA/NSA/Sub6
Speed HSPA, LTE, 5G
Launch
Announced 2021, February 25
Status Available. Released 2021, March 04
Body
Dimensions 163.7 x 76.4 x 7.8 mm (6.44 x 3.01 x 0.31 in)
Weight 196 g (6.91 oz)
SIM Dual SIM (Nano-SIM, dual stand-by)
Display
Type Super AMOLED, 120Hz, HDR10+, 1300 nits (peak)
Size 6.67 inches, 107.4 cm2 (~85.9% screen-to-body ratio)
Resolution 1080 x 2400 pixels, 20:9 ratio (~395 ppi density)
Protection Corning Gorilla Glass 5
Platform
OS Android 11, MIUI 12
Chipset Qualcomm SM8250-AC Snapdragon 870 5G (7 nm)
CPU Octa-core (1x3.2 GHz Kryo 585 & 3x2.42 GHz Kryo 585 & 4x1.80 GHz Kryo 585)
GPU Adreno 650
Memory
Card slot No
Internal 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM, 256GB 12GB RAM
Main Camera
Triple 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
Single 20 MP, f/2.5, (wide), 1/3.4", 0.8µm
Features HDR
Video 1080p@30fps, 720p@120fps
Sound
Loudspeaker Yes, with stereo speakers
3.5mm jack No
Comms
WLAN Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct
Bluetooth 5.1, A2DP, LE
Positioning GPS (L1+L5), GLONASS (G1), BDS (B1I+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC
NFC Yes
Infrared port Yes
Radio No
USB USB Type-C 2.0, OTG
Features
Sensors Fingerprint (side-mounted), accelerometer, gyro, proximity, compass, color spectrum
Battery
Type Li-Po 4520 mAh, non-removable
Charging 33W wired, PD3.0, QC3, 100% in 52 min (advertised)
Misc
Colors Black, White, Aurora
Models M2012K11AC
Price About 280 EUR

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