Xiaomi Redmi K40

Name: Xiaomi Redmi K40
Brand: Xiaomi

Display6.67" 1080 x 2400 pixels

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

Main camera48MP

Battery4520 mAh

7.4GoSolo score

More Xiaomi

Network

Technology

GSM / CDMA / HSPA / CDMA2000 / LTE / 5G

2G bands

GSM 850 / 900 / 1800 / 1900

3G bands

HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100

4G bands

1, 2, 3, 4, 5, 7, 8, 18, 19, 26, 28, 34, 38, 39, 40, 41, 42

5G bands

1, 3, 28, 41, 77, 78 SA/NSA/Sub6

Speed

HSPA, LTE, 5G

Launch

Announced

2021, February 25

Status

Available

Body

Dimensions

163.7 x 76.4 x 7.8 mm (6.44 x 3.01 x 0.31 in)

Weight

196 g (6.91 oz)

SIM

Nano-SIM + Nano-SIM

Display

Type

Super AMOLED, 120Hz, HDR10+, 1300 nits (peak)

Size

6.67 inches, 107.4 cm2 (~85.9% screen-to-body ratio)

Resolution

1080 x 2400 pixels, 20:9 ratio (~395 ppi density)

Protection

Corning Gorilla Glass 5

Platform

Android 11, MIUI 12

Chipset

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

CPU

Octa-core (1x3.2 GHz Kryo 585 & 3x2.42 GHz Kryo 585 & 4x1.80 GHz Kryo 585)

GPU

Adreno 650

Memory

Card slot

Internal

128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM, 256GB 12GB RAM

Type

UFS 3.1

Main Camera

Modules

48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.2, 119˚ (ultrawide) 5 MP, f/2.4, 50mm (macro)

Features

Color spectrum sensor, LED flash, HDR, panorama

Video

4K@30fps, 1080p@30/60/120/240/960fps, gyro-EIS

Selfie Camera

Module

20 MP, f/2.5, (wide), 1/3.4", 0.8µm

Features

HDR · 1080p@30fps, 720p@120fps

Sound

Loudspeaker

Yes, with stereo speakers

3.5mm jack

Comms

WLAN

Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct

Bluetooth

5.1, A2DP, LE

Positioning

GPS (L1+L5), GLONASS (G1), BDS (B1I+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC

NFC

Yes

Radio

USB

USB Type-C 2.0, OTG

Features

Sensors

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

Battery

Type

Li-Po 4520 mAh

Charging

33W wired, PD3.0, QC3, 100% in 52 min

Misc

Colors

Black, White, Aurora

Models

M2012K11AC

GoSolo Read / what it means6 takeaways

performance

Snapdragon 870, Adreno 650 GPUHandles games like PUBG Mobile and Genshin Impact at medium-high settings; everyday apps and social media run without lag.

display

6.67-inch, 120Hz Super AMOLED, 1300 nitsScrolling social feeds and games feel smooth; you can read text in bright sunlight without squinting, though reflections can still be visible.

camera

48MP main, f/1.8, 26mm wideTakes clear daytime shots and handles low light reasonably well thanks to the large aperture and PDAF; the 8MP 119° ultrawide fits more into group and landscape shots.

battery

4520mAh, about 1 day light-to-moderate useHeavy users (gaming, video streaming) will hit empty by evening; moderate users who text and browse can stretch it to nighttime.

charging

33W wired, roughly 52 minutes to fullYou can top up to 80% in about 30 to 35 minutes, enough to get through a day if you charge at lunch or during work.

durability

Gorilla Glass 5, 7.8mm thin, 196gProtects against everyday drops and scratches but is not rated for water; the thin frame and weight make it easy to carry, though it feels less rigid than heavier phones.