New Release Updated: Mar 2026

Xiaomi Redmi K40S

$293 (Expected Price)

Reviewed by the MobGadgets Tech Team

We analyze specs, compare pricing, and aggregate real-world data to bring you unbiased mobile reviews. Learn how we test.

Display 6.67" AMOLED

Processor Snapdragon 870 5G

Battery 4500mAh

RAM & Storage 128GB/256GB storage, no card slot

Full Specs

Should you buy the Xiaomi Redmi K40S?

Reasons to Buy

Massive The Xiaomi Redmi K40S is equipped with a 4,500mAh battery, which provides a good battery life. It offers a decent screen-on time and standby time, allowing users to comfortably use the device throughout the day without worrying about frequent recharging. The phone also supports fast charging at 67W, ensuring quick recharging times. Additionally, it has optimization features to enhance battery performance and efficiency. Although it doesn't support wireless charging, the Redmi K40S offers a reliable battery backup and manages battery drain effectively. The battery capacity is sufficient for most users' needs, and with proper battery management, it can maintain good health and longevity. Overall, the battery endurance of the Xiaomi Redmi K40S is commendable, providing a reliable power source for daily use. battery life
Large 6.7" display for media
Excellent value at $293

Reasons to Avoid

May be bulky due to large battery
Average camera performance in low light

Full Specifications

Network Technology: GSM / CDMA / HSPA / CDMA2000 / LTE / 5G

Launch Announced: 2022, March 17 Status: Available. Released 2022, March 17

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 - : 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 OS: 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 - No Internal: 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM, 256GB 12GB RAM
- : UFS 3.1

Main Camera Triple: 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 Single: 20 MP, (wide) Video: 1080p@30/120fps

Sound Loudspeaker : Yes, with stereo speakers 3.5mm jack : No
- : 24-bit/192kHz Hi-Res audio

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: No 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 Price: About 260 EUR

Frequently Asked Questions

With its Dimensity 6300 chipset and 6GB of RAM, it handles everyday tasks and moderate gaming efficiently, though extremely graphic-intensive games may require lower settings.

Yes, to complement its massive The Xiaomi Redmi K40S is equipped with a 4,500mAh battery, which provides a good battery life. It offers a decent screen-on time and standby time, allowing users to comfortably use the device throughout the day without worrying about frequent recharging. The phone also supports fast charging at 67W, ensuring quick recharging times. Additionally, it has optimization features to enhance battery performance and efficiency. Although it doesn't support wireless charging, the Redmi K40S offers a reliable battery backup and manages battery drain effectively. The battery capacity is sufficient for most users' needs, and with proper battery management, it can maintain good health and longevity. Overall, the battery endurance of the Xiaomi Redmi K40S is commendable, providing a reliable power source for daily use. battery, it features standard fast charging capabilities to get you back up and running quickly.