New Release Updated: Mar 2026

Xiaomi Redmi K40

$336 (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 4520mAh

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

Full Specs

Should you buy the Xiaomi Redmi K40?

Reasons to Buy

Massive The Xiaomi Redmi K40 comes with a decent battery that offers good performance and endurance. With its battery capacity and power efficiency, the device can easily last through a full day of moderate to heavy usage. The battery optimization features and battery management options help in maximizing the battery life by intelligently managing app usage and background processes. The fast charging technology ensures that the device can be quickly charged, saving users valuable time. Additionally, the Redmi K40 supports wireless charging, providing convenience for those who prefer a cable-free charging experience. Users can expect a satisfactory screen-on time and standby time, thanks to the efficient battery performance. The battery capacity is sufficient to handle various tasks without draining quickly. Overall, the battery of the Xiaomi Redmi K40 offers a reliable and long-lasting experience, making it suitable for users who prioritize battery endurance. battery life
Large 6.7" display for media
Excellent value at $336

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: 2021, February 25 Status: Available. Released 2021, March 04

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

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 OS: 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 - 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, 26mm (wide), 1/2.0", 0.8µm, PDAF
8 MP, f/2.2, 119˚ (ultrawide)
5 MP, f/2.4, 50mm (macro), 1/5.0", 1.12µm Features: LED flash, HDR, panorama Video: 4K@30fps, 1080p@30/60/120/240/960fps, gyro-EIS

Selfie camera Single: 20 MP, f/2.5, (wide), 1/3.4", 0.8µm Features: HDR Video: 1080p@30fps, 720p@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: 5.1, A2DP, LE Positioning: GPS (L1+L5), GLONASS (G1), BDS (B1I+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC NFC: Yes Infrared port: Yes Radio: No USB: USB Type-C 2.0, OTG

Features Sensors: Fingerprint (side-mounted), accelerometer, gyro, proximity, compass, color spectrum

Battery Type: Li-Po 4520 mAh, non-removable Charging: 33W wired, PD3.0, QC3, 100% in 52 min (advertised)

Misc Colors: Black, White, Aurora Models: M2012K11AC Price: About 280 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 K40 comes with a decent battery that offers good performance and endurance. With its battery capacity and power efficiency, the device can easily last through a full day of moderate to heavy usage. The battery optimization features and battery management options help in maximizing the battery life by intelligently managing app usage and background processes. The fast charging technology ensures that the device can be quickly charged, saving users valuable time. Additionally, the Redmi K40 supports wireless charging, providing convenience for those who prefer a cable-free charging experience. Users can expect a satisfactory screen-on time and standby time, thanks to the efficient battery performance. The battery capacity is sufficient to handle various tasks without draining quickly. Overall, the battery of the Xiaomi Redmi K40 offers a reliable and long-lasting experience, making it suitable for users who prioritize battery endurance. battery, it features standard fast charging capabilities to get you back up and running quickly.