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Xiaomi

Xiaomi Redmi K40 (2021)

Android OS v11.0
Qualcomm Snapdragon 870
Adreno 650
6 GB / 128 GB
6.67 inch (1440 x 3200 px)
108 + 8 + 5 + 2 MP, 12000 x 9000 px, autofocus, optical image stabilization

This phone comes equipped with a 6.67 inch IPS display, a Qualcomm Snapdragon 870 chipset, and 6 GB of RAM.

Unravel its secrets, both the highs and lows!

Table of Contents

This article shares our personal experiences and thoughts about using the Xiaomi Redmi K40 smartphone. We hope to offer helpful insights to others interested in this device.

Xiaomi Redmi K40 / 1

Xiaomi Redmi K40 specifications

BrandXiaomi
NameRedmi K40
ModelM2011K2C
Release date2021

Weight, dimensions, colors

Weight7.34 oz
Dimensions6.44 x 3.01 x 0.31 inch
Colorsblack, blue
SIM typeNano SIM

The weight of Xiaomi Redmi K40 is about 7.34 oz with battery. This is average for smartphones of the same size. Smartphones use a Nano SIM as a small chipcard for a subscriber identity module (SIM).

System, chipset, performance

OS versionAndroid OS v11.0
SoCQualcomm Snapdragon 870
CPUOcta-core, Single-core 3.2 GHz Kryo 585, Triple-core 2.4 GHz Kryo 585, Quad-core 1.8 GHz Kryo 385
GPUAdreno 650

The Xiaomi Redmi K40 comes with Android OS v11.0 out of the box. Android is a mobile operating system. Google built it using a modified version of the Linux kernel. They also used other open-source software. An advanced scheduler manages this octa-core CPU. It assigns tasks to the CPU for real-time speed and power efficiency. Qualcomm's Snapdragon processors work with Adreno GPUs. The processors are designed for the GPUs.

Display type, size, resolution

Display typeIPS
Screen size6.67 inch
Resolution1440 x 3200 px
Multitouch supportyes

The 6.67 inch IPS display has better features. These include optimal viewing angles, color accuracy, and unchanging color reproduction. The 6.67 inch display should be big enough for our needs. It will make viewing comfortable. This is true whether we're reading, browsing, or watching. The size of the screen is measured diagonally, from corner to corner.

Memory, storage

RAM6 GB
Internal storage128 GB
Memory card slotmicroSD

The Xiaomi Redmi K40 comes with 6 GB of RAM, which is considered to be sufficient for most users' needs. More RAM lets us keep more apps and processes open in the background. This keeps the device from slowing down. The Redmi K40 has 128 GB of internal storage, which is more than enough for their needs. We can expand the internal storage (128 GB) with a compatible microSD card.

Cameras, flash

Main camera108 + 8 + 5 + 2 MP, 12000 x 9000 px, autofocus, optical image stabilization
FlashDual LED
Selfie camera30 MP

Using multiple cameras has advantages. They provide more versatility and creative possibilities. They let us capture a wider range of subjects. The main camera of Redmi K40 has optical image stabilization (OIS). It counters camera shake.

Connectivity, network, wireless

GSM 2G bands850 / 900 / 1800 / 1900
Network coverage2G / 3G / 4G / 5G
Wi-FiWi-Fi 802.11 a/b/g/n/ac
Bluetoothv5.1, A2DP
GPSA-GPS, GLONASS
NFCyes
FM radioyes
USBUSB Type-C
Headphone3.5 mm jack

The 5G networks use advanced technologies. These include millimeter-wave (mmWave) frequencies, massive MIMO, and network slicing. The phone is capable of connecting to Wi-Fi networks. The Redmi K40 smartphone is capable of connecting to Bluetooth devices. The GPS allows this smartphone to find their exact location. It provides accurate navigation and mapping. The Redmi K40 comes with NFC (Near Field Communication) functionality. The 3.5 mm headphone jack allows us to connect wired headphones or earphones to the device.

Battery type, capacity, charger

TypeLi-Po 4500 mAh, non-removable

The Li-Po 4500 mAh, non-removable battery gives the smartphone a good battery backup. The lithium polymer (Li-Po) battery is a light-weight, rechargeable battery. The battery of Redmi K40 isn't removable without voiding the warranty.

Features, sensors, specials

Sensorsaccelerometer, compass, fingerprint, geomagnetic, gravity, gyroscope, light, pedometer, proximity
SpecialsCorning Gorilla Glass, Dual SIM, Fast charging, Hi-Res Audio, MIUI

Today, smartphones come with many sensors. They help make the user experience better. The accelerometer is a sensor. It measures the tilting motion and orientation of the phone. The Redmi K40 phone has a fingerprint scanner. The light sensor detects the level of light in the environment. Dual SIM is great for businesses. They want to give staff a device with separate numbers and bills for personal and business use.

The fast charging technology comes in handy when we need quick juice on our device. Corning Gorilla Glass is tougher. It resists scratches, impacts, and drops.

Verdict, pros and cons

Every phone has its strengths and weaknesses, and this Xiaomi phone is no exception. As with any device, there are aspects that shine and others that fall short. By examining both sides, we can paint a complete picture of what this phone has to offer. Let's explore its standout features and areas for improvement. Remember, this is just my opinion, and yours might be different.

Pros

  • appropriate screen size
  • adequate memory
  • generous internal storage
  • microSD slot
  • multicamera setup
  • optical image stabilization (OIS)
  • 5G support
  • Dual SIM support
  • Corning Gorilla Glass shield

Cons

  • none
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Updated: July 1, 2024

Lucas Bradley I'm Lucas Bradley, the founder of the Phone42.com site. I love technology, especially smartphones, and I've been working with tech stuff for more than 20 years. This means I've seen a lot of changes and have learned a bunch about what makes a good phone. On Phone42.com, I look at all kinds of phones. They can be from big, well-known companies or new ones trying to make their mark. I want to help people understand what's new and cool in the world of smartphones, in a way that's easy to get.
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