Redmi K40S

Redmi K40S

Redmi K40S is basically 2022 version of Redmi K40.

~ $270 - ₹20790
Redmi K40S
  • Redmi K40S
  • Redmi K40S
  • Redmi K40S

Redmi K40S Key Specs

  • Screen:

    6.67″, 1080 x 2400 pixels, OLED, 120 Hz

  • Chipset:

    Qualcomm SM8250-AC Snapdragon 870 5G (7 nm)

  • Dimensions:

    163.7 76.4 7.8 mm (6.44 3.01 0.31 in)

  • SIM Card Type:

    Dual SIM (Nano-SIM, dual stand-by)

  • RAM and Storage:

    6/8/12GB RAM, 128GB 6GB RAM, UFS 3.1

  • Battery:

    4520 mAh, Li-Po

  • Main Camera:

    48MP, f/1.79, 4K

  • Android Version:

    Android 13, MIUI 14

out of 5
4 Reviews
  • Fast charging OIS support High refresh rate High RAM capacity
  • No SD Card slot No headphone jack

Redmi K40S Summary

The Redmi K40S is a great phone for anyone looking for a budget-friendly option that doesn't sacrifice on quality. The phone has a 6.67-inch OLED display with a resolution of 1080 x 2400 and a refresh rate of 60Hz. It is powered by a Snapdragon 870 processor, and comes with 6GB/8GB of RAM and 128GB/256GB of storage. The phone also has a quad-camera setup that includes a 48MP main camera, an 8MP ultrawide camera, a 2MP macro camera. The Redmi K40S also has a 4520mAh battery that supports 67W fast charging. Overall, the Redmi K40S is a great option for anyone looking for a budget-friendly phone that doesn't sacrifice on quality or features.

Redmi K40S Battery

Battery life is always an important consideration when choosing a smartphone, and the Redmi K40S has a lot to offer in this regard. The phone is equipped with a 4520mAh battery, which is plenty of juice for even the most demanding users. And thanks to the phone's efficient processor, you can expect to get great battery life even when using power-hungry apps and games. What's more, the Redmi K40S supports 67W fast charging, so you can top up your battery in no time at all. Whether you're looking for a phone that can last all day or one that can charge up quickly, the Redmi K40S is sure to meet your needs.

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Redmi K40S Full Specifications

General Specs
Model Number22021211RC
Release Date2022, March 17
Out Price$283


Aspect Ratio and PPI20:9 ratio - 526 ppi density
Size6.67 inches, 107.4 cm2 (~86.4% screen-to-body ratio)
Refresh Rate120 Hz
Resolution1080 x 2400 pixels
Peak brightness (nit)
ProtectionCorning Gorilla Glass 5


Dimensions163.7 76.4 7.8 mm (6.44 3.01 0.31 in)
Weight196 gr (6.91 oz)
MaterialGlass front (Gorilla Glass 5), plastic back
Water Resistant
SensorsFingerprint (side-mounted), accelerometer, gyro, proximity, compass, color spectrum
3.5mm JackNo
USB TypeUSB Type-C 2.0, USB On-The-Go
Cooling System
Loudspeaker Loudness (dB)



TechnologyGSM / CDMA / HSPA / CDMA2000 / LTE / 5G
2G BandsGSM - 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G BandsHSDPA - 850 / 900 / 1700(AWS) / 1900 / 2100
4G Bands1, 2, 3, 4, 5, 7, 8, 18, 19, 26, 28, 34, 38, 39, 40, 41, 42
5G Bands1, 3, 28, 41, 77, 78 SA/NSA/Sub6
NavigationYes, with dual-band A-GPS, GLONASS, BDS, GALILEO, QZSS, NavIC
Network SpeedHSPA 42.2/5.76 Mbps, LTE-A, 5G
SIM Card TypeDual SIM (Nano-SIM, dual stand-by)
Number of SIM Area2 SIM
Wi-FiWi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct, hotspot
Bluetooth5.1, A2DP, LE
FM RadioNo
SAR VALUEThe FCC limit is 1.6 W/kg measured in a volume of 1 gram of tissue.
Body SAR (AB)
Head SAR (AB)
Body SAR (ABD)
Head SAR (ABD)


ChipsetQualcomm SM8250-AC Snapdragon 870 5G (7 nm)
CPUOcta-core (1x3.2 GHz Kryo 585 & 3x2.42 GHz Kryo 585 & 4x1.80 GHz Kryo 585)
Process Technology
GPUAdreno 650
GPU Cores
GPU Frequency
Android VersionAndroid 12, MIUI 13
Play Store


RAM Capacity6 GB, 8 GB, 12 GB
RAM Type
Storage128GB 6GB RAM, UFS 3.1
SD Card SlotNo


Antutu Score



Capacity4500 mAh
Quick Charge Technology
Charging Speed67W
Video Playback Time
Fast Charging
Wireless Charging
Reverse Charging


MAIN CAMERA The following features may vary with the software update.
First Camera
SensorSony IMX 582
Pixel Size
Sensor Size
Optical Zoom
Second Camera
Resolution8 megapixels
SensorSony IMX 355
Pixel Size
Sensor Size
Optical Zoom
Third Camera
Resolution2 megapixels
Pixel Size
Sensor Size
Optical Zoom
Image Resolution48 megapixels
Video Resolution and FPS4K@30fps, 1080p@30/60/120/240/960fps, gyro-EIS
Optical Stabilisation (OIS)Yes
Electronic Stabilisation (EIS)
Slow Motion Video
FeaturesLED flash, HDR, panorama

DxOMark Score

Mobile Score (Rear)
Selfie Score


First Camera
Resolution20 MP
Pixel SizeSamsung
Sensor Size
Video Resolution and FPS1080p@30fps, 720p@120fps

Redmi K40S FAQ

How long does the battery of the Redmi K40S last?

The Redmi K40S battery has a capacity of 4520 mAh.

Does Redmi K40S have NFC?

Yes, Redmi K40S have NFC

What is Redmi K40S refresh rate?

Redmi K40S has 120 Hz refresh rate.

What is the Android version of Redmi K40S?

The Redmi K40S Android version is Android 12, MIUI 13.

What is the display resolution of Redmi K40S?

The Redmi K40S display resolution is 1080 x 2400 pixels.

Does Redmi K40S have wireless charging?

No, Redmi K40S doesn't have wireless charging.

Is the Redmi K40S water and dust resistant?

No, Redmi K40S doesn't have water and dust resistant.

Does the Redmi K40S come with a 3.5mm headphone jack?

No, Redmi K40S doesn't have 3.5mm headphone jack.

What is the Redmi K40S camera megapixels?

The Redmi K40S has 48MP camera.

What is the camera sensor of Redmi K40S?

The Redmi K40S has Sony IMX 582 camera sensor.

What is the price of Redmi K40S?

The price of Redmi K40S is $270.

Which MIUI version will be last update of Redmi K40S?

MIUI 17 will be the last MIUI version of Redmi K40S.

Which Android version will be last update of Redmi K40S?

Android 15 will be the last Android version of Redmi K40S.

How many updates will Redmi K40S get?

Redmi K40S will get 3 MIUI and 4 years of Android security updates until MIUI 17.

How many years will Redmi K40S get updates?

Redmi K40S will get 4 years of security update since 2022.

How often will Redmi K40S get updates?

Redmi K40S gets update every 3 months.

Redmi K40S outs of box with which Android version?

Redmi K40S outs of box with MIUI 13 based on Android 12.

When will Redmi K40S get the MIUI 13 update?

Redmi K40S launched with MIUI 13 out-of-box.

When will Redmi K40S get the Android 12 update?

Redmi K40S launched with Android 12 out-of-box.

When will Redmi K40S get the Android 13 update?

Yes, Redmi K40S will get Android 13 update in Q1 2023.

When will Redmi K40S update support will end?

Redmi K40S update support will end on 2026.

Redmi K40S User Reviews and Opinions

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There are 4 comments on this product.

SilencedFrost11 months ago
I definitely recommend

very cheap for a very good camera and chip configuration, but not so good for people who don\'t know how to unlock and install global MIUI

  • Good camera for the price
  • Powerful chip
  • Have 5G
  • Plastic body, need a phone case to protect it
  • Comes in the box with china ROM
Alternative Phone Suggestion: poco f4
Show Answers
ThinhNQ1 year ago
I recommend

Bought 2 months ago, installed EU and really happy with it. Definitely would recommend.

  • No tint like in F3
  • Less heat generated while gaming compared to F3
  • Just MIUI sucks
Alternative Phone Suggestion: Poco F4
Show Answers
Abang Mi Jer1 year ago
I definitely recommend

Tak Lawak Tak Ceria!

  • Easy going
  • Soft Body ,need use carefully
Alternative Phone Suggestion: Under Warranty,but not confirm to stay longer
Partha hdar1 year ago
I recommend

Redmi k40s have a sony selfie camera sensor..not check it ...

Show all opinions for Redmi K40S 4

Redmi K40S Video Reviews

Review on Youtube

Redmi K40S

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