vivo X21i
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Network
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2G networkGSM 850, 900, 1800, 1900; CDMA 800 & TD-SCDMA
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3G networkHSDPA 850, 900, 2100
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4G networkLTE frequency band 1(2100), 3(1800), 4(1700/2100), 5(850), 8(900), 38(2600), 39(1900), 40(2300), 41(2500)
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HSPA speedHSPA
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LTE speedLTE
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GPRSYes
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EDGEYes
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Availability
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Oficially announced2018-5
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Status2018-5
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Design
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BuildAluminium alloy, glass
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SIMHybrid Dual SIM (Nano-SIM, dual stand-by)
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Height154.4 mm
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Width75 mm
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Thickness7 mm
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Weight159 g
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ColorsAurora White, Black, Ruby Red
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Display
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Display typeSuper AMOLED capacitive touchscreen
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Physical size6.28 inches
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Resolution1080 x 2280 pixels
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Pixel density402 ppi
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Display colors16777216
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MultitouchYes
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Hardware
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CPUOcta-core
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CPUQuad-core 2 GHz Cortex-A73
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CPU(second)quad-core 2 GHz Cortex-A53
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ChipsetMediatek MT6771 Helio P60
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GPUMali-G72 MP3
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Memory RAM4, 6 GB
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Internal storage64, 128 GB
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Memory cardmicroSD(uses second SIM slot)
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Memory card max256 GB
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OS
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OSAndroid 8.1 (Oreo)
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Main camera
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Camera typeDual
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Main camera12 MP, f/1.8, 1/2.5", 1.4 µm
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5 MP, f/2.4
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Primary camera resolution4032 x 3024 pixels
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Primary camera video1080p@30fps
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Primary camera Autofocusdual pixel phase detection autofocus
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Primary camera flashLED flash
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Camera featuresGeo-tagging, HDR, face detection, panorama, touch focus
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Selfie camera
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Selfie camera24 MP
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Selfie camera resolution5632 x 4224 pixels
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Selfie camera video1080p@30fps
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Sound
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3.5mm jackYes
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LoudspeakerYes
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NotificationsVibration; MP3, WAV ringtones
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EarpieceYes
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Multimedia
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Radio FMFM radio
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Connectivity
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WLANWi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac
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WLAN WiFi HotspotYes
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WLAN WiFi DirectYes
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WLAN WiFi Dual BandYes
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USBmicroUSB 2.0
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USB On-The-GoYes
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Bluetoothv5.0
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Bluetooth A2DPYes
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bluetooth LEYes
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GPSYes, with A-GPS
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GLONASSYes
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Features
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Messaging SMSSMS(threaded view)
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Messaging MMSMMS
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Messaging EmailEmail
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Messaging Push EmailPush Email
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SensorsFingerprint (rear-mounted), accelerometer, compass, proximity
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Browser
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HTMLHTML5
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Battery
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Battery typeLi-Ion
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Battery capacity3425 mAh
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Battery removableNon-removable
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Fast battery chargingYes