Overview

- Release date: 2021, March
- Known as Xiaomi Redmi K40
- Android 11
- Size of 163.7 x 76.4 x 7.8 mm
- 196 grams

Display

- 6.67" FullHD 20:9 resolution (2400 x 1080)
- Super AMOLED (120Hz) (HDR10+)
- Screen-to-body ratio: ~85.9%
- 395 ppi density
- Corning Gorilla Glass 5

Memory

- 128 / 256 GB mass storage
- Non-expandable
- 6 / 8 / 12 GB RAM (LPDDR5, 2750 MHz)

Battery

- Non-removable 4520 mAh battery
- (?) hours talk time (3G)

Sensors

✔ Gyroscope
✔ Accelerometer
✔ Proximity
✔ Compass
❌ Barometer

Processor

- Qualcomm Snapdragon 870 5G (1 Kryo 585 up to 3.2 GHz + 3 Kryo 585 up to 2.42 GHz + 4 Kryo 585 up to 1.80 GHz)
- GPU: Adreno 650

Cameras

- 48 MP (f/1.8 and sensor size 1/2"), 8 MP (f/2.2) and 5 MP (1/5") main cameras
- 20 MP (1/3.4") front

✔ Image Stabilizer
✔ Main LED flash
❌ Front LED flash

Sound

- Loudspeaker(s): Stereo
- Microphone(s): Stereo

Connectivity

- Supports 5G up to 2 Gbps
- Bluetooth 5.1
- Wi-Fi 802.11 a/b/g/n/ac/ax

❌ Headphone jack
✔ Type-C USB 3.2
✔ OTG USB
❌ FM Radio
✔ NFC
❌ eSIM

· 2G networks
850 / 900 / 1800 / 1900
· 3G networks
850 / 900 / 1700 / 1900 / 2100
· 4G networks
1 / 2 / 3 / 4 / 5 / 7 / 8 / 18 / 19 / 26 / 28 / 34 / 38 / 39 / 40 / 41 / 42
· 5G networks
1 / 3 / 28 / 41 / 77 / 78

Additional features

- Dual SIM version
- Fast battery charging (Quick Charge 3+, 100% in 52 minutes)
- Fingerprint reader
- USB Power Delivery 3