vivo V15 vs vivo X21i
vivo V15
vivo X21i
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Network
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2G networkGSM 850, 900, 1800, 1900GSM 850, 900, 1800, 1900; CDMA 800 & TD-SCDMA
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3G networkHSDPA 850, 900, 2100HSDPA 850, 900, 2100
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4G networkLTE frequency band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 38(2600), 40(2300), 41(2500)LTE 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 speed-HSPA
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LTE speed-LTE
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GPRSYesYes
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EDGEYesYes
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Availability
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Oficially announced2019-32018-5
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Status2019-32018-5
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Design
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BuildPlasticAluminium alloy, glass
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SIMDual SIM (Nano-SIM, dual stand-by)Hybrid Dual SIM (Nano-SIM, dual stand-by)
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Height161.2 mm154.4 mm
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Width75.9 mm75 mm
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Thickness8.5 mm7 mm
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Weight186 g159 g
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ColorsBlue, RedAurora White, Black, Ruby Red
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Display
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Display typeIPS LCD capacitive touchscreenSuper AMOLED capacitive touchscreen
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Physical size6.53 inches6.28 inches
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Resolution1080 x 2340 pixels1080 x 2280 pixels
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Pixel density395 ppi402 ppi
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Display colors1677721616777216
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ProtectionScratch resistant, 2.5D curved glass screen, Corning Gorilla Glass 5-
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MultitouchYesYes
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Hardware
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CPUOcta-coreOcta-core
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CPUQuad-core 2.1 GHz Cortex-A73Quad-core 2 GHz Cortex-A73
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CPU(second)Hexa-core 2.0 GHz Cortex-A53quad-core 2 GHz Cortex-A53
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ChipsetMediaTek Helio P70Mediatek MT6771 Helio P60
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GPUMali-G72 MP3Mali-G72 MP3
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Memory RAM6 GB4, 6 GB
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Internal storage128 GB64, 128 GB
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Memory cardmicroSD, microSDHC, microSDXCmicroSD(uses second SIM slot)
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Memory card max256 GB256 GB
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OS
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OSFuntouch 9 (Android 9.0 Pie)Android 8.1 (Oreo)
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Main camera
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Camera typeTripleDual
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Main camera12 MP, f/1.812 MP, f/1.8 , 1/2.5" , 1.4 µm
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8 MP, f/2.2 , 13 mm5 MP, f/2.4
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5 MP, f/2.4
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Primary camera resolution4032 x 3024 pixels4032 x 3024 pixels
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Primary camera video2160p@30fps, 1080p@30fps1080p@30fps
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Primary camera Autofocus-dual pixel phase detection autofocus
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Primary camera flashLED flashLED flash
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Primary camera phase detection autofocusphase detection autofocus-
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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-modeGeo-tagging, HDR, face detection, panorama, touch focus
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Selfie camera
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Selfie camera32 MP, f/2.024 MP
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Selfie camera resolution6560 x 4928 pixels5632 x 4224 pixels
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Selfie camera video1080p@30fps1080p@30fps
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Sound
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3.5mm jackYesYes
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LoudspeakerYesYes
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Notifications-Vibration; MP3, WAV ringtones
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EarpieceYesYes
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Multimedia
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RadioFM Radio-
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Radio FM-FM radio
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Connectivity
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WLANWi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11acWi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac
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WLAN WiFi HotspotYesYes
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WLAN WiFi DirectYesYes
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WLAN WiFi Dual BandYesYes
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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 LEYesYes
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GPSYes, with A-GPSYes, with A-GPS
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GLONASSYesYes
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BDSYes-
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Features
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Messaging SMS-SMS(threaded view)
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Messaging MMS-MMS
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Messaging Email-Email
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Messaging Push Email-Push Email
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SensorsAccelerometer, compass, fingerprint, gyro, proximityFingerprint (rear-mounted), accelerometer, compass, proximity
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Browser
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HTMLHTML5HTML5
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Battery
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Battery typeLi-PoLi-Ion
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Battery capacity4000 mAh3425 mAh
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Battery removableNon-removableNon-removable
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Fast battery chargingYesYes
