Xiaomi Redmi K40S

Name: Xiaomi Redmi K40S
Brand: Xiaomi

Display6.67" 1080 x 2400 pixels

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

Main camera48MP

Battery4500 mAh

7.8GoSolo 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, 8, 18, 19, 26, 34, 38, 39, 40, 41, 42

5G bands

1, 3, 5, 8, 28, 38, 40, 41, 77, 78 SA/NSA

Speed

HSPA, LTE, 5G

Launch

Announced

2022, March 17

Status

Available

Body

Dimensions

163.2 x 76 x 7.7 mm (6.43 x 2.99 x 0.30 in)

Weight

195 g (6.88 oz)

Build

Glass front (Gorilla Glass 5), plastic back

SIM

Nano-SIM + Nano-SIM

Durability

Splash resistant

Display

Type

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

Size

6.67 inches, 107.4 cm2 (~86.6% screen-to-body ratio)

Resolution

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

Protection

Corning Gorilla Glass 5

Platform

Android 12, MIUI 13

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, (wide), 1/2.0", 0.8µm, PDAF, OIS 8 MP, 119˚ (ultrawide) 2 MP (macro)

Features

Color spectrum sensor, Dual-LED dual-tone flash, HDR, panorama

Video

4K@30fps, 1080p@30/60/120fps, 720p@960fps; gyro-EIS

Selfie Camera

Module

20 MP, (wide)

Features

1080p@30/120fps

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

5.2, A2DP, LE

Positioning

GPS (L1+L5), GLONASS (L1), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC (L5)

NFC

Yes

Radio

USB

USB Type-C 2.0, OTG

Features

Sensors

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

Battery

Type

Li-Po 4500 mAh

Charging

67W wired, PD3.0, QC3, 100% in 38 min

Misc

Colors

Black, Gray, Blue, Green

GoSolo Read / what it means6 takeaways

display

6.67" AMOLED, 120Hz, 1300 nitsThe 120Hz refresh keeps scrolling smooth, and 1300 nits peak brightness means you can read it outdoors in sunlight without squinting, though everyday indoor use won't hit that ceiling.

performance

Snapdragon 870, Adreno 650 GPUThis chipset handles demanding games like PUBG and Genshin Impact at high settings at 60fps, and day-to-day apps open instantly with no lag.

camera

48MP main, f/1.8 OIS, 8MP ultra-wideThe f/1.8 and optical stabilization let you take sharp shots in poor light, and the 119-degree ultra-wide captures entire rooms or group shots without backing up.

battery

4500 mAh, roughly 6 to 7 hours screen-onA full day of mixed use is realistic, though heavy video streaming or gaming will drain it by evening.

charging

67W wired, ~38 minutes to fullYou can top the battery from empty to 100% before leaving for work, making it easy to skip a charger in your bag on short trips.

durability

Gorilla Glass 5, splash resistantThe phone survives accidental rain or a spill on the table, but it is not waterproof, so avoid submerging it.