Mid-range · 2021

Xiaomi Redmi K40

Name: Xiaomi Redmi K40
Brand: Xiaomi

Our Take CPU benches near recent mid-range phones like the Google Pixel Fold

A solid mid-ranger with an AMOLED screen and a 120Hz display.

Best for Streaming · reading · social

Strength AMOLED screen, 120Hz smooth scrolling

6.67″ Super AMOLED · 120Hz

Snapdragon 870 5G 6 / 128 GB

4520 mAh 33W charging

48 MP 3 rear · 20 MP selfie

5G NFC

Compare

Full specifications

What stands out

Hi-Res audio, Dolby Atmos for higher-quality listening

Pro camera extras: manual focus

960 fps slow motion for action clips

Display

6.67″ · Super AMOLED · 1080 × 2400 · 120 Hz · HDR

OLED + smooth

A clean OLED panel — colours pop and sunlight visibility is solid.

Screen size

6.67"

Panel type

Super AMOLED

OLED

Resolution

1080 × 2400 px

Refresh rate

120 Hz

Smooth

Brightness

1300 nits

HDR

Supported

Protection

Corning Gorilla Glass 5

Performance

Qualcomm SM8250-AC Snapdragon 870 5G (7 nm) · 8-core 3.2 GHz · Adreno 650

Everyday capable

Daily apps and casual games run smoothly — heavy gaming will drop frames.

Chipset

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

Current CPU tier

Mid-range

Launch class

Upper mid-range

AnTuTu

802,870

v10

CPU

8-core, 3.2 GHz

GPU

Adreno 650

Process

7 nm

RAM type

RAM LPDDR5

Storage type

UFS Storage 3.1

CPU layout

1x Cortex A77 3.20 GHz + 3x Cortex A77 2.4 GHz + 4x Cortex A55 1.8 GHz

Camera

48 MP f/1.8 main · 20 MP selfie · 4K video

4K video

A standard camera setup — sharp in daylight, expect noise in low light.

Main camera

48 MP f/1.8

Ultrawide

8 MP f/2.2

Macro

5 MP f/2.4

Front camera

20 MP f/2.5

Main sensor

Sony IMX582 Exmor RS, 1/2.96", 0.6µm

Slow motion

Yes, 960 fps

Camera extras

manual focus

Video

4K @ 30 fps

4K video

Battery

4520 mAh · 33 W wired

Battery is average for the class — fine for daily use.

Capacity

4520 mAh

Wired charging

33 W

Removable

Audio

Stereo · Dolby Atmos · Hi-Res

Stereo speakers

Speakers

Stereo

Dolby Atmos

Supported

Hi-Res audio

Supported

Audio features

Hi-Res audio, Dolby Atmos

Memory

6 GB RAM · 128 GB

RAM

6 GB

Storage

128 GB

Storage type

UFS 3.1

Expandable

Connectivity

5G · NFC · Wi-Fi 6

Modern radios

Yes

4G LTE

Yes

NFC

Yes

Contactless

Wi-Fi

Wi-Fi 6

Modern Wi-Fi

Bluetooth

5.1

GPS systems

GPS, A-GPS, GLONASS, Beidou, QZSS, Galileo, GPS (L1+L5), Galileo (E1+E5a), NavIC System, QZSS (L1 + L5)

USB

USB-C

USB OTG

Supported

3.5mm jack

IR blaster

SIM

1× Nano-SIM

Build & Design

196 g · 7.8 mm

Height

163.7 mm

Width

76.4 mm

Thickness

7.8 mm

Weight

196 g

Sensors

Fingerprint (side-mounted) · accelerometer · gyro · proximity

Sensors

Fingerprint (side-mounted), accelerometer, gyro, proximity, compass

Specifications sourced from GSMArena

How it stacks up against the rest.

Quick reads against a few phones in the same price tier. Tap any one for the deep comparison.

Apple iPhone 13

Trades blows 2 wins 3 losses

Smoother display

Super AMOLED vs OLED panel · 120 Hz vs 60 Hz refresh · 6.67″ vs 6.1″ screen

40% larger battery capacity

33 W vs 15 W charging · 4,520 mAh vs 3,240 mAh battery

Lower benchmark score

803k vs 1.3M AnTuTu · Mid-range vs High-end tier

Less stable camera

No OIS vs OIS · 4K @ 30 fps vs 4K @ 60 fps video

Less protected

None vs IP68 protection · 196 g vs 174 g

Full comparison

Samsung Galaxy S21 5G

Loses on most 1 win 4 losses

13% larger battery capacity

4,520 mAh vs 4,000 mAh battery

Weaker display tech

Super AMOLED vs Dynamic AMOLED panel · Tradeoff: 6.67″ vs 6.2″ screen

Lower performance tier

Mid-range vs Upper mid-range tier

Less stable camera

No OIS vs OIS · 4K @ 30 fps vs 8K @ 24 fps video

Less protected

None vs IP68 protection · 196 g vs 169 g

Full comparison

Where to buy

We don't have any listings for this phone yet. Try searching on Konga or Jiji.

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Similar Phones

How each one compares to the Xiaomi Redmi K40.

Mid-range

Xiaomi Redmi K40

Full specifications

Display

Performance

Camera

Battery

Audio

Memory

Connectivity

Build & Design

Sensors

How it stacks up against the rest.

Apple iPhone 13

Samsung Galaxy S21 5G

Where to buy

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