NIU C21A vs vivo Y51
NIU C21A
vivo Y51
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Network
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2G networkGSM 850, 900, 1800, 1900GSM 850, 900, 1800, 1900
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3G network-TD-SCDMA
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TD-SCDMA speed-TD-SCDMA
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TD-LTE speed-TD-LTE
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GPRSYesYes
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EDGEYes
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Availability
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Oficially announced2013-32015-12
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Status2013-42015-12
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Design
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SIMDual SIM (Mini-SIM)Dual SIM
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Height106 mm143.8 mm
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Width45 mm71.7 mm
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Thickness14.5 mm7.5 mm
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Weight73 g157 g
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ColorsBlack, Blue, Fuchsia, Green, Purple, Red, WhiteWhite
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Display
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Display typeTFTIPS LCD capacitive touchscreen
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Physical size1.8 inches5.0 inches
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Resolution128 x 160 pixels540 x 960 pixels
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Pixel density114 ppi220 ppi
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Display colors26214416777216
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Hardware
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CPUQuad-core 1.2 GHz
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Internal storage64 Mbit16 GB
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Memory RAM-2 GB
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Memory cardmicroSDmicroSD
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Memory card max32 GB128 GB
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Main camera
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Main camera8 MP
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Primary camera resolution640 x 480 pixels3264 x 2448 pixels
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Primary camera videono1080p@30fps
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Primary camera Autofocus-autofocus
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Primary camera flash-LED flash
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Camera featuresNoGeo-tagging, HDR, face detection, panorama, touch focus
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Selfie camera
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Secondary cameraNo-
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Selfie camera5 MP
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Sound
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3.5mm jackNoYes
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LoudspeakerYesYes
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NotificationsVibration, PolyphonicVibration; MP3, WAV ringtones
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Multimedia
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Radio FMStereo FM radioFM radio
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Connectivity
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WLANWi-Fi
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USBYesmicroUSB 2.0
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Bluetoothv2.0Yes
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GPSNoYes, with A-GPS
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BDS-Yes
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Features
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Messaging SMSSMSSMS(threaded view)
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Messaging MMS-MMS
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Messaging Email-Email
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Messaging IMIMIM
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Messaging Push Mail-Push Mail
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WAPYes-
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JavaNoNo
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Sensors-Accelerometer, compass, proximity
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Battery
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Battery typeLi-IonLi-Ion
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Battery capacity600 mAh2350 mAh
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Talk time4 h-
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Standby time200 h-
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OS
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OS-Android OS, v5.0.2 (Lollipop)
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Browser
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HTML-HTML5
