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Specifications
 

Xiaomi Redmi K40S

Xiaomi 12X

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Xiaomi Redmi K40S
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Xiaomi Redmi K40S

Xiaomi 12X

Network
Technology GSM / CDMA / HSPA / CDMA2000 / LTE / 5G GSM / CDMA / HSPA / EVDO / LTE / 5G
2G bands GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900
  CDMA 800 CDMA 800
3G Network HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100
  CDMA2000 1x CDMA2000 1xEV-DO
4G Network 1, 2, 3, 4, 5, 8, 18, 19, 26, 34, 38, 39, 40, 41, 42 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 26, 28, 32, 38, 39, 40, 41, 42, 48, 66 - International
  1, 2, 3, 4, 5, 7, 8, 18, 19, 26, 34, 38, 39, 40, 41, 42 - China
5G Network 1, 3, 5, 8, 28, 38, 40, 41, 77, 78 SA/NSA 1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78 SA/NSA - International
  1, 3, 5, 8, 28, 38, 40, 41, 77, 78 SA/NSA - China
Speed HSPA, LTE, 5G HSPA, LTE, 5G
Launch
Announced 2022, March 17 2021, December 28
Status Available. Released 2022, March 17 Available. Released 2021, December 31
Body
Dimensions 163.2 x 76 x 7.7 mm (6.43 x 2.99 x 0.30 in) 152.7 x 69.9 x 8.2 mm (6.01 x 2.75 x 0.32 in)
Weight 195 g (6.88 oz) 176 g (6.21 oz)
Build Glass front (Gorilla Glass 5), plastic back
SIM Nano-SIM + Nano-SIM Nano-SIM + Nano-SIM
 Splash resistant
Display
Type AMOLED, 120Hz, HDR10+, 1300 nits (peak) AMOLED, 68B colors, 120Hz, Dolby Vision, HDR10+, 1100 nits (peak)
Size 6.67 inches, 107.4 cm2 (~86.6% screen-to-body ratio) 6.28 inches, 95.2 cm2 (~89.2% screen-to-body ratio)
Resolution 1080 x 2400 pixels, 20:9 ratio (~395 ppi density) 1080 x 2400 pixels, 20:9 ratio (~419 ppi density)
Protection Corning Gorilla Glass 5 Corning Gorilla Glass Victus
Platform
OS Android 12, MIUI 13 Android 11, MIUI 13
Chipset Qualcomm SM8250-AC Snapdragon 870 5G (7 nm) 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) Octa-core (1x3.2 GHz Kryo 585 & 3x2.42 GHz Kryo 585 & 4x1.80 GHz Kryo 585)
GPU Adreno 650 Adreno 650
Memory
Card slot No No
Internal 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM, 256GB 12GB RAM 128GB 8GB RAM, 256GB 8GB RAM, 256GB 12GB RAM
 UFS 3.1 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, f/2.4, (macro)
50 MP, f/1.9, 26mm (wide), 1/1.56", 1.0µm, PDAF, OIS
13 MP, f/2.4, 12mm, 123˚ (ultrawide), 1/3.06", 1.12µm
5 MP, f/2.4, 50mm (telephoto macro), AF
Features Color spectrum sensor, Dual-LED dual-tone flash, HDR, panorama Dual-LED dual-tone flash, HDR, panorama
Video 4K@30fps, 1080p@30/60/120fps, 720p@960fps; gyro-EIS 8K@24fps, 4K@30/60fps, 1080p@30/120/240/960fps, gyro-EIS
Selfie Camera
Modules 20 MP, (wide) 32 MP, f/2.5, 26mm (wide), 0.7µm
Features HDR, panorama
Video 1080p@30/120fps 1080p@30/60fps, 720p@120fps, HDR
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Sound
Loudspeaker Yes, with stereo speakers Yes, with stereo speakers
3.5mm jack No No
 24-bit/192kHz Hi-Res audio 24-bit/192kHz Hi-Res audio
Tuned by Harman Kardon
Comms
WLAN Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct Wi-Fi 802.11 a/b/g/n/ac, Wi-Fi 6 (market dependent), dual-band, Wi-Fi Direct
Bluetooth 5.2, A2DP, LE 5.1 / 5.2, A2DP, LE
Positioning GPS (L1+L5), GLONASS (L1), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC (L5) GPS (L1+L5), GLONASS (L1), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC (L5)
NFC Yes Yes (market/region dependent)
Infrared port No Yes
Radio No No
USB USB Type-C 2.0, OTG USB Type-C 2.0, OTG
Features
Sensors Fingerprint (side-mounted), accelerometer, gyro, proximity, compass Fingerprint (under display, optical), accelerometer, proximity, gyro, compass
Battery
Type Li-Po 4500 mAh Li-Po 4500 mAh
Charging 67W wired, PD3.0, QC3, 100% in 38 min 67W wired, PD3.0, QC4, 100% in 39 min
Misc
Colors Black, Gray, Blue, Green Gray, Blue, Purple
SAR EU 0.59 W/kg (head)     1.00 W/kg (body)    
Models 2112123AC, 2112123AG
Price About 260 EUR £ 142.71 / € 145.45
Tests
Performance AnTuTu: 598003 (v8), 690298 (v9)
GeekBench: 3168 (v5.1)
GFXBench: 47fps (ES 3.1 onscreen)
Display Contrast ratio: Infinite (nominal)
Loudspeaker -25.6 LUFS (Very good)
Battery (old) Endurance rating 105h

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