Realme C31 vs Xiaomi Redmi K40
Realme C31
Xiaomi Redmi K40
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Network
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2G networkGSM 850, 900, 1800, 1900GSM 850, 900, 1800, 1900; CDMA 800
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3G networkHSDPA 850, 900, 2100HSDPA 850, 900, 1700(AWS), 1900, 2100; CDMA2000 1x
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4G networkLTELTE frequency band 1, 2, 3, 4, 5, 7, 8, 18, 19, 26, 28, 34, 38, 39, 40, 41, 42
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5G network-5G band 1, 3, 28, 41, 77, 78 SA/NSA/Sub6
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HSDPA speed42.2 Mbps42.2 Mbps
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HSUPA speed5.76 Mbps5.76 Mbps
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LTE speedLTE-A, 151 Mbps download, 51 Mbps uploadLTE-A, 1174 Mbps download, 210 Mbps upload
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GPRSYesYes
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EDGEYesClass 8
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Availability
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Oficially announced2022-032021-02
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Status2022-032021-03
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Design
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BuildGlass front, plastic frame, plastic backGlass, Metal
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SIMDual SIM (Nano-SIM, dual stand-by)Dual SIM (Nano-SIM, dual stand-by)
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Height164.7 mm163.7 mm
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Width76.2 mm76.4 mm
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Thickness8.4 mm7.8 mm
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Weight197 g196 g
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ColorsGreen, SilverAurora, Black, White
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Display
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Display typeIPS LCDSuper AMOLED
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Physical size6.5 inches6.67 inches
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Resolution720 x 1600 pixels1080 x 2400 pixels
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Pixel density270 ppi395 ppi
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Display colors1677721616777216
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Protection-Scratch resistant, 3D curved glass screen, Corning Gorilla Glass 5
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Display features-120Hz, HDR10+, 1300 nits (peak), sunscreen 3.0, night light screen
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Hardware
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CPUOcta-coreOcta-core
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CPUDual-core 1.8 GHz Cortex-A75Single-core 3.2 GHz Kryo 585
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CPU(second)Hexa-core 1.8 GHz Cortex-A55Triple-core 2.42 GHz Kryo 585
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CPU(third)Quad-core 1.80 GHz Kryo 585
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ChipsetUnisoc Tiger T612Qualcomm SM8250-AC Snapdragon 870 5G
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GPUMali-G57Adreno 650
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Memory RAM4, 6 GB6, 8, 12 GB
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Internal storage32, 64 GB128, 256 GB
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Memory cardmicroSD, microSDHC, microSDXCNo
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Memory card max1 TB-
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Storage-UFS 3.1
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OS
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OSAndroid 11, Realme UI 2.0Android 11, MIUI 12
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Main camera
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Camera typeTripleTriple
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Main camera(wide) , 13 MP, f/2.2 , 81˚ , 24 mm, 4x digital zoom(wide) , 48 MP, f/1.8 , 26 mm, 1/2" , 0.8 µm
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(macro) , 2 MP, f/2.4(ultrawide) , 8 MP, f/2.2 , 119˚
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(depth) , 0.3 MP, f/2.8(macro) , 5 MP, 50 mm, 1/5.0" , 1.12 µm
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Primary camera resolution4208 x 3120 pixels8000 x 6000 pixels
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Primary camera video1080p@30fps4K@30fps, 1080p@30/60/120/240/960fps, gyro-EIS
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Primary camera flashLED flashLED flash
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Camera features-Autofocus, continuous shooting, digital zoom, digital image stabilization, optical image stabilization, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, phase detection autofocus
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Selfie camera
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Selfie camera typeSingleSingle
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Selfie camera5 MP, f/2.0 , 76˚20 MP, (wide) , 1/3.4" , 0.8 µm
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Selfie camera resolution2592 x 1944 pixels5184 x 3880 pixels
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Selfie camera features-Face unlock, HDR
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Selfie camera video720p@30fps1080p@30fps, 720p@120fps
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Sound
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3.5mm jackYesNo
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LoudspeakerYesYes, with stereo speakers
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EarpieceYesYes
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Multimedia
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RadioFM RadioNo
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Connectivity
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WLANWi-Fi 802.11b, 802.11g, 802.11nWi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5GHz, 802.11ac, 802.11ax
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WLAN WiFi Hotspot-Yes
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WLAN WiFi Direct-Yes
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WLAN WiFi Dual Band-Yes
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USBmicroUSB 2.0Type-C 2.0
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USB On-The-Go-Yes
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Bluetoothv5.0v5.1
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Bluetooth A2DPYesYes
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bluetooth LE-Yes
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Infrared-Yes
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NFCNoYes
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GPSYes, with A-GPSYes, with dual-band A-GPS
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GLONASSYesYes
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GALILEOYesYes
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BDSYesYes
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QZSS-Yes
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NavIC-Yes
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Features
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SensorsAccelerometer, fingerprint, proximityAccelerometer, color spectrum, compass, fingerprint, gyroscope, proximity
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Browser
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HTMLHTML5HTML5
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Battery
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Battery typeLi-PoLi-Po
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Battery capacity5000 mAh4520 mAh
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Battery removableNon-removableNon-removable
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Fast battery chargingNoQuick Charge 3.0 (100% in 52 min)
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Tests and performance
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Antutu224223 (v9)673599 (v8)
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Geekbench(single-core)356 (v5.2)928 (v5.2)
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Geekbench(multi-core)1279 (v5.2)3260 (v5.2)
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Cost
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Price110 USD470 USD