Oppo A1k vs Realme C21
Oppo A1k
Realme C21
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Network
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2G networkGSM 850, 900, 1800, 1900GSM 850, 900, 1800, 1900
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3G networkWCDMA 850, 900, 2100HSDPA 850, 900, 2100
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4G networkLTE frequency band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 18(800), 28(700), 38(2600), 40(2300), 41(2500)LTE frequency band 1, 3, 5, 7, 8, 20, 28, 38, 40, 41
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HSDPA speed-42.2 Mbps
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HSUPA speed-5.76 Mbps
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LTE speedLTE Cat 4, 150.8 Mbps download, 51 Mbps uploadLTE, Cat4, 150 Mbps download, 51 Mbps upload
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GPRSYesYes
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EDGEYesYes
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Availability
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Oficially announced2019-42021-03
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Status2019-52021-03
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Design
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BuildPlastic bodyGlass front, plastic back, plastic frame
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SIMDual SIM (Nano-SIM, dual SIM stand-by)Dual SIM (Nano-SIM, dual stand-by)
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Height154.5 mm165.2 mm
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Width73.8 mm76.4 mm
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Thickness8.4 mm8.9 mm
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Weight170 g190 g
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ColorsBlack, RedBlack, Blue
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Display
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Display typeIPS capacitive touchscreenIPS LCD
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Physical size6.1 inches6.5 inches
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Resolution720 x 1560 pixels720 x 1600 pixels
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Pixel density282 ppi270 ppi
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Display colors1677721616777216
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Protection2.5D curved glass screen, scratch resistant, Corning Gorilla Glass 3Scratch resistant, 2.5D curved glass screen, Corning Gorilla Glass 3
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MultitouchYes-
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Hardware
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CPUOcta-coreOcta-core
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CPUQuad-core 2 GHz Cortex-A53Quad-core 2.3 GHz Cortex-A53
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CPU(second)quad-core 1.5 GHz Cortex-A53quad-core 1.8 GHz Cortex-A53
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ChipsetMediatek Helio P22 (MT6762)MediaTek Helio G35
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GPUPowerVR GE8320PowerVR GE8320
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Memory RAM2 GB3, 4 GB
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Internal storage32 GB32, 64 GB
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Memory cardmicroSD, microSDHC, microSDXCmicroSD, microSDHC, microSDXC
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Memory card max256 GB256 GB
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Storage-eMMC 5.1
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OS
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OSColorOS 6.0 (Android 9.0 Pie)Android 10, Realme UI 1.0 / Android 11, Realme UI 2.0
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Main camera
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Camera typeSingleTriple
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Main camera8 MP, f/2.2 , 1/3.2" , 1.4 µm13 MP, f/2.2 , 1/3.06" , 1.12 µm, (wide) , 26 mm
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(macro) , 2 MP, f/2.4
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(depth) , 2 MP, f/2.4
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Primary camera resolution3264 x 2448 pixels2560 x 1920 pixels
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Primary camera video1080p@30fps1080p@30fps
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Primary camera flashLED flashLED flash
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Camera featuresAutofocus, continuous shooting, digital zoom, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, phase detectionAutofocus, digital zoom, digital 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 type-Single
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Selfie camera5 MP, f/2 , 1/5" , 1.12 µm5 MP, f/2.2 , 1/5.0" , 1.12 µm, (wide)
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Selfie camera resolution2560 x 1920 pixels2560 x 1920 pixels
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Selfie camera features-Face unlock, HDR, panorama
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Selfie camera video720p@30fps1080p@30fps
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Sound
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3.5mm jackYesYes
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LoudspeakerYesYes
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EarpieceYesYes
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Multimedia
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RadioNoFM Radio
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Connectivity
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WLANWi-Fi 802.11b, 802.11g, 802.11nWi-Fi 802.11b, 802.11g, 802.11n
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WLAN WiFi HotspotYesYes
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Wi-Fi displayYes-
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USBmicroUSB 2.0microUSB 2.0
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USB On-The-GoYesYes
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Bluetoothv4.2v5.0
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Bluetooth A2DPYesYes
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bluetooth LE-Yes
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NFC-No
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GPSYes, with A-GPSYes, with A-GPS
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GLONASSYesYes
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BeidouYes-
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BDS-Yes
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Features
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SensorsAccelerometer, proximity, light, compass, fingerprintAccelerometer, compass, fingerprint, 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 capacity4000 mAh5000 mAh
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Battery removableNon-removableNon-removable
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Fast battery charging-Yes
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Reverse charging-Yes
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Tests and performance
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Antutu-110490 (v8)
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Geekbench(single-core)-174 (v5.2)
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Geekbench(multi-core)-982 (v5.2)
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Cost
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Price-130 USD
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