Redmi K40

  • Xiaomi
  • Last Updated: 2nd November 2025
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Key Specs
  • Display 6.67-inch (1080x2400)
  • Processor Qualcomm Snapdragon 870
  • Front Camera 20MP
  • Rear Camera 48MP + 8MP + 5MP
  • RAM 6GB, 8GB, 12GB
  • Storage 128GB, 256GB
  • Battery Capacity 4520mAh
  • OS Android 11
Market Status Released
Release Date 25th February 2021

Redmi K40 Summary

Redmi K40 mobile was launched on 25th February 2021. The phone comes with a 6.67-inch touchscreen display offering a resolution of 1080x2400 pixels and an aspect ratio of 20:9. Redmi K40 is powered by an octa-core Qualcomm Snapdragon 870 processor. It comes with 6GB, 8GB, 12GB of RAM. The Redmi K40 runs Android 11 and is powered by a 4520mAh battery. The Redmi K40 supports proprietary fast charging.

As far as the cameras are concerned, the Redmi K40 on the rear packs a triple camera setup featuring a 48-megapixel (f/1.79) primary camera; an 8-megapixel camera, and a 5-megapixel camera. The rear camera setup has autofocus. It has a single front camera setup for selfies, featuring a 20-megapixel sensor.

The Redmi K40 runs MIUI 12 is based on Android 11 and packs 128GB, 256GB of inbuilt storage. The Redmi K40 is a dual-SIM (GSM and GSM) mobile that accepts Nano-SIM and Nano-SIM cards. The Redmi K40 measures 163.70 x 76.40 x 7.80mm (height x width x thickness) and weighs 196.00 grams. It was launched in Dreamland, Glossy Black, and Icy White colours.

Connectivity options on the Redmi K40 include Wi-Fi 802.11 a/b/g/n/ac/ax, GPS, Bluetooth v5.10, NFC, Infrared, USB Type-C, 3G, 4G (with support for Band 40 used by some LTE networks in India) , and 5G. Sensors on the phone include accelerometer, ambient light sensor, compass/ magnetometer, gyroscope, proximity sensor, and in-display fingerprint sensor.

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Available Variants
6GB RAM
128GB STORAGE
Redmi K40 (6GB,128GB)
8GB RAM
128GB STORAGE
Redmi K40 (8GB,128GB)
8GB RAM
256GB STORAGE
Redmi K40 (8GB,256GB)
12GB RAM
256GB STORAGE
Redmi K40 (12GB,256GB)

Redmi K40 Full Specifications

General
Brand Xiaomi
Model Redmi K40
Release date 25th February 2021
Launched in India No
Form factor Touchscreen
Dimensions (mm) 163.70 x 76.40 x 7.80
Weight (g) 196.00
Battery capacity (mAh) 4520
Fast charging Proprietary
Colours Dreamland, Glossy Black, Icy White
Display
Screen size (inches) 6.67
Touchscreen Yes
Resolution 1080x2400 pixels
Aspect ratio 20:9
Hardware
Processor octa-core
Processor make Qualcomm Snapdragon 870
RAM 6GB, 8GB, 12GB
Internal storage 128GB, 256GB
Camera
Rear camera 48-megapixel (f/1.79) + 8-megapixel + 5-megapixel
No. of Rear Cameras 3
Rear autofocus Yes
Rear flash Yes
Front camera 20-megapixel
No. of Front Cameras 1
Software
Operating system Android 11
Skin MIUI 12
Connectivity
Wi-Fi Yes
Wi-Fi standards supported 802.11 a/b/g/n/ac/ax
GPS Yes
Bluetooth Yes, v 5.10
NFC Yes
Infrared Yes
USB Type-C Yes
Number of SIMs 2
SIM 1
SIM Type Nano-SIM
GSM/CDMA GSM
3G Yes
4G/ LTE Yes
5G Yes
Supports 4G in India (Band 40) Yes
SIM 2
SIM Type Nano-SIM
GSM/CDMA GSM
3G Yes
4G/ LTE Yes
5G Yes
Supports 4G in India (Band 40) Yes
Sensors
In-Display Fingerprint Sensor Yes
Compass/ Magnetometer Yes
Proximity sensor Yes
Accelerometer Yes
Ambient light sensor Yes
Gyroscope Yes
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