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Xiaomi Redmi K40

Xiaomi Redmi K40
Brand: Xiaomi
Category: Phones
  • Display 6.67-inch Full-HD+ screen
  • Camera 48 MP + 8 MP + 5 MP Main / 20 MP front
  • Memory 6/8/12GB RAM with 128/256GB ROM
  • Platform Snapdragon 870 / Android 11

Our Rating

The rating is based on the opinions of users and reliable reviewers.

  • Design, Built Quality 7 / 10
  • Display Quality 9 / 10
  • Camera Quality 10 / 10
  • Audio & Multimedia 7 / 10
  • OS and Usability 9 / 10
  • Battery Performance 10 / 10

Xiaomi Redmi K40 Highlights and Overview

Xiaomi’s Redmi K40 is the direct successor to the Redmi K30 of last year. Although the new comer comes with series of upgrades starting from design, display, OS and even core device features, but the most notable upgrade is the use of the latest Snapdragon 870 CPU from Qualcomm. Display wise, the K40 comes in a 6.67-inches screen with a central tiny-notch. The display is FHD+, and it has 120Hz refresh with up to 1,300 nit peak brightness.

On the inside, there is the aforementioned Qualcomm Snapdragon 870 CPU, a 7nm octa-core 5G Chipset clocked at 3.2GHz, along with Adreno 650 GPU, up to 12GB RAM and up to 256GB internal storage.

As for the camera specs, there is a triple rear snapper on the K40, and these includes a 48-megapixel main lens with PDAF and 1/2″ sensor size, a secondary 8-megapixel ultrawide sensor with up to 119˚ FoV and a third 5-megapixel Telemacro lens along with a single LED flash. For selfie, there is a 20-megapixel snapper hidden in the tiny hole upfront.

The device is available in Black, White and Aurora colors. It come with a side-mounted fingerprint scanner, support dual Nano-SIMs with 4G/5G SA/NSA support, fueled by a 4520mAh battery with 33W fast charger and run the latest Google Android 11 with MIUI 12 out of the box. The full specs of Xiaomi’s Redmi K40 is contained in the table below.

Xiaomi Redmi K40 Full Specifications and Features


Technology GSM / CDMA / HSPA / CDMA2000 / LTE / 5G
2G Network Bands GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
CDMA 800
3G Network Bands HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
CDMA2000 1x
4G Network Bands LTE band 1, 2, 3, 4, 5, 7, 8, 18, 19, 26, 28, 34, 38, 39, 40, 41, 42
5G Network Bands 5G band 1, 3, 28, 41, 77, 78 SA/NSA/Sub6
Speed HSPA 42.2/5.76 Mbps, LTE-A, 5G


Also Known As -


Dimensions 163.7 x 76.4 x 7.8 mm
Weight 196 grams
Build Glass front (Gorilla Glass 5)
SIM Type Dual SIM (Nano-SIM, dual stand-by)


Display Type Super AMOLED capacitive touchscreen, 16M colors
Size 6.67 inches, 107.4 cm2 (~85.9% screen-to-body ratio)
Resolution 1080 x 2400 pixels, 20:9 ratio (~395 ppi density)


Operating System 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 Qualcomm Adreno 650


RAM + ROM 6/8/12 GB
Card Slot No


Camera Type Triple Lenses
Camera Sensor(s) Main: 48 MP, f/1.8, 26mm, 1/2", 0.8µm, PDAF
Ultrawide: 8 MP, f/2.2, 119˚
Telemacro: 5 MP, 50mm, 1/5.0", 1.12µm
Camera Features PDAF
Digital zoom
Touch focus
Face detection
Video Resolution 4K@30fps, 1080p@30/60/120/240/960fps, gyro-EIS


Camera Type Single Lens
Camera Sensor(s) 20-megapixel punch hole camera
Camera Features FaceID
Face beautification
Video Resolution 1080p@30fps, 720p@120fps


Loudspeaker Yes, with stereo speakers
Speaker Location Placed at the basement and top
Audio Jack Type No


Bluetooth 5.1, A2DP, LE
GPS Yes, with dual-band A-GPS, GLONASS, BDS, GALILEO, QZSS, NavIC
FM Radio No


Battery Capacity Non-removable Li-Po 4520 mAh battery
Wireless Charging Yes, Quick Charge 3+


Sensors Fingerprint (side-mounted), accelerometer, proximity, compass
Box Contents Charging Brick / USB cable

Xiaomi Redmi K40 User Reviews and Opinions

Comments 1

  1. Noreen says:

    Where do I get these phones in Zimbabwe, kindly reply to my email below

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Disclaimer Note

We CANNOT guarantee 100% accuracy for the specification table above.