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Xiaomi Redmi K40

Xiaomi Redmi K40
MORE PICTURES
  • Released 2021, March 04
    196g, 7.8mm thickness
    Android 11, MIUI 12
    128GB/256GB storage, no card slot
  • 1.5% 2,213,106 hits
  • 228 Become a fan
  • 6.67"
    1080x2400 pixels
  • 48MP
    2160p
  • 6-12GB RAM
    Snapdragon 870 5G
  • 4520mAh
    33W
  • Pictures
  • Compare
  • Opinions

Network Technology GSM / CDMA / HSPA / CDMA2000 / LTE / 5G
2G bands GSM 850 / 900 / 1800 / 1900
  CDMA 800
3G bands HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
  CDMA2000 1x
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. 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 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 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 Color spectrum sensor, 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
Battery Type Li-Po 4520 mAh
Charging 33W wired, PD3.0, QC3, 100% in 52 min
Misc Colors Black, White, Aurora
Models M2012K11AC
Price About 280 EUR

Disclaimer. We can not guarantee that the information on this page is 100% correct. Read more

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  • Opinions

Xiaomi Redmi K40 - user opinions and reviews

R
  • Redmi K40
  • X37
  • 13 Apr 2025

Great phone still, only downside is its battery. Degraded after 4 years of usage. SD 870 works like wonders. Hope it got more updates. Install Pixel Experience, cameras great and overall its still solid in the big 25.

  • Reply
3
  • 3umo
  • 8t7
  • 13 Mar 2025

Bought it in Aug 4 2021.. Installed a custom rom on it and changed the battery after 3.5 years, still a great phone and it functions so well

  • Reply
P
  • Poco F3
  • y6V
  • 08 Dec 2024

Still works wonders, although I did experience deadboot after about two years. I got it reballed and it still works

  • Reply
  • Read all opinions
  • Post your opinion
Total user opinions: 251

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