1. GizChina.it - ​​Your Tech horizon
  2. Technical Data
  3. smartphone
  4. Redmi K40

Redmi K40

Redmi K40
Brand: Redmi
Category: smartphone
  • CPU: Qualcomm Snapdragon 870
  • RAM: 6 / 8 / 12 GB
  • storage: 128 / 256 GB
  • Display: 6,67 "Full HD + 120 Hz
  • Camera: 48 + 8 + 5 MP

Redmi K40 - Specifications


Launch date February 25 2021


Size 163,7 x 76,4 x 7,8 mm
Weight 196 g
Colors Icy White, Glossy Black, Dreamland


Type Display Technology => A number of display technologies and types used in mobile phones => TFT (Thin Film Transistor), IPS (In-Place Switching), OLED (Organic Light Emitting Diode), AMOLED (Active-Matrix Organic Light-Emitting Diode), Super AMOLED (an even advanced version of AMOLED), Resistive Touchscreen (Resistive touchscreens contain two layer of conductive material with a very small gap between them which acts as a resistance), Capacitive Touchsceen (Capacitive touchscreen technology consists of a layer of glass coated with a transparent conductor) AMOLED
Panel Dish
Diagonal 6,67 "
Resolution 2400 x 1080 pixels (Full HD +)
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. PPI 395
A 20:9
Screen-to-body ratio 85.9%
Refresh rate 120 Hz
Touch sampling 360 Hz
Protection Display Protection => Gorilla Glass is a special alkali-aluminosilicate glass shield with exceptional damage protection that helps protect your mobile phone from scratches, drops, and bumps of everyday use. . Gorilla Glass 5

Biometric release

Fingerprint reader Side
Facial recognition 2D


Chipset manufacturer chipset is a group of integrated circuits designed to perform one or more dedicated functions, often with real time computing constraints. Qualcomm
SoC Snapdragon 870
Production Process 7 nm
CPU Octa-core
Frequency 1 x 3,2 GHz + 3 x 2,42 GHz + 4 x 1,8 GHz
Architecture Kryo 585
But by the full GPU acceleration tech But by the full GPU acceleration tech (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. Adreno 650
RAM RAM (Random Access Memory) is a type of computer memory that can be accessed without touching the preceding bytes that allows information to be stored and accessed quickly from random locations. RAM is the most common type of memory found in computer systems, smartphones, tablets and other electronic devices. 6 / 8 / 12 GB LPDDR5
Memory 128 / 256 GB UFS 3.1
Vibration X axis


Operating system OS => Every computer system runs on a base software called Operating System (OS). Operating System controls all basic operations of the computer (such as smartphones, PDAs, tablet computers and other handheld devices). The Operating System allows the user to install and run third party applications (apps), apps are used to add new functionality to the device. Android 11
User interface UI or user interface of a device is the look and feel of the on-screen system menu. How it works, its color scheme, how it responds to button presses, all of these things are part of the user interface. MIUI 12


Capacity Battery Capacity is a measure (typically in Amp-hr) of the charge stored by the battery, and is determined by the mass of active material contained in the battery. The battery capacity represents the maximum amount of energy that can be extracted from the battery under certain conditions. 4.520 mAh
Quick charge 33W
Reverse wireless charging


Bluetooth Bluetooth is a wireless communications technology for exchanging data between mobile phones, headsets, computers and other network devices over short distances without wires, Bluetooth technology was primarily designed to support simple wireless networking of personal consumer devices. 5.1
Wi-Fi Wi-Fi is a popular wireless networking technology using radio waves to provide high-speed network connections that allow devices to communicate without cords or cables, Wi-Fi is increasingly becoming the preferred mode of internet connectivity all over the world. Wi-Fi 6 ax
Dual Frequency GPS
NFC NFC (Near field communication) is a set of standards for smartphones and similar devices to establish peer-to-peer radio communications with each other by touching them together or bringing them into proximity, usually no more than a few inches.
USB Type-C
Video Output HDMI (High-Definition Multimedia Interface) is a compact audio / video interface for transferring uncompressed video data from a HDMI-compliant source device to a compatible computer monitor, video projector, digital television, or digital audio device.
FM radio
Infrared Infrared connectivity is an old wireless technology used to connect two electronic devices. It uses a line of sight and operates only at close range.
2G bands B3, B8
3G bands B1, B2, B4, B5, B6, B8, B19
4G bands FDD-LTE: B1 / B2 / B3 / B4 / B5 / B7 / B8 / B18 / B19 / B26 / B28A
TDD-LTE: B34 / B38 / B39 / B40 / B41 / B42
5G bands n1 / n3 / n28A / n41 / n77 / n78


Speaker Stereo (capsule and lower frame)


Primary 48 MP, f / 1.79, 0.8 µm, 1 / 2.25
Sensore Sony IMX582 Exmor RS
Stabilisation phase ICE CREAM
Wide 8 MP, f / 2.2, 1.14 µm, 1 / 2.8
FoV 119 °
Macro 5 MP, f / 2.4, 1.12 µm, 1 / 5
Autofocus PDAF
Video 4K 30fps, 1080p 30/60 fps, 720p 30fps
Selfie room 20 MP
Front sensor Samsung S5K3T2, 0.8 µm, 1 / 3.4
Type Punch-hole

Our evaluation

The evaluation of the product is based, in almost all cases, on the test performed during the review.


    Redmi K40 it is one of the two top of the range 5G di start 2021 from the manufacturer, with a datasheet based on the Qualcomm SoC Snapdragon 870. Measure 163,7 x 76,4 x 7,8 mm, weighs 196 g and is available in Glossy Black, Icy White and Dreamland colors. In addition, it integrates a display AMOLED E4 da 6,67 "Full HD +, refresh rate a 120 Hz. The biometric unlocking takes place via a lateral fingerprint sensor, in addition to 2D facial recognition.

    The Qualcomm chipset contains a Kryo 585 octa-core CPU (1 x 3.2 GHz + 3 x 2.42 GHz + 4 x 1.8 GHz) and a GPU Adreno 650. Memories side we have cuts from 6 / 128 GB, 8 / 128 GB8 / 256 GB e 12 / 256 GB and there is a battery from 4.520 mAh with quick charge 33W. The operating system is Android 11 with proprietary MIUI 12 interface.

    The photographic sector includes a triple rear camera from 48 + 8 + 5 MP f/1.79-2.2-2.4, with 119 ° wide-angle sensor and a 50 mm macro. On the front there is a punch-hole selfie camera with a 20 MP. The Redmi K40 data sheet includes a certified stereo stereo speaker Dolby Atmos.

    Redmi K40 - Photo


    BrandsView All

    Show More Brands