Micromax Ninja A91 vs vivo Y51
Micromax Ninja A91
vivo Y51
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Network
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2G networkGSM 900, 1800GSM 850, 900, 1800, 1900
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3G networkHSDPA 2100TD-SCDMA
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HSDPA speedHSDPA-
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HSUPA speedHSUPA-
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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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EDGEYesYes
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Availability
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Oficially announced2013-32015-12
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Status2013-32015-12
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Design
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SIMDual SIMDual SIM
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Height130 mm143.8 mm
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Width66 mm71.7 mm
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Thickness10 mm7.5 mm
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Weight149.1 g157 g
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ColorsBlackWhite
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Display
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Display typeTFT touchscreenIPS LCD capacitive touchscreen
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Physical size4.5 inches5.0 inches
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Resolution480 x 854 pixels540 x 960 pixels
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Pixel density218 ppi220 ppi
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Display colors-16777216
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Hardware
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CPUDual-core 1 GHz ARM Cortex-A9Quad-core 1.2 GHz
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ChipsetMediatek MT6577-
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GPUPowerVR SGX531u-
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Internal storage2 GB16 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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OS
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OSAndroid OS, v4.0 (Ice Cream Sandwich)Android OS, v5.0.2 (Lollipop)
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Main camera
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Main camera5 MP8 MP
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Primary camera resolution2592 x 1944 pixels3264 x 2448 pixels
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Primary camera videovideo1080p@30fps
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Primary camera Autofocus-autofocus
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Primary camera flash-LED flash
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Camera features-Geo-tagging, HDR, face detection, panorama, touch focus
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Selfie camera
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Secondary cameraVGA camera-
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Selfie camera5 MP
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Sound
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3.5mm jackYesYes
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LoudspeakerYesYes
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NotificationsVibration, Polyphonic, MP3 ringtonesVibration; MP3, WAV ringtones
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Multimedia
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Radio FMFM radioFM radio
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Connectivity
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WLANWi-Fi 802.11b, 802.11g, 802.11nWi-Fi
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WLAN WiFi HotspotYes-
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USBYesmicroUSB 2.0
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Bluetoothv3.0Yes
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GPSYesYes, with A-GPS
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BDS-Yes
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Features
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Messaging SMSSMS(threaded view)SMS(threaded view)
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Messaging MMSMMSMMS
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Messaging EmailEmailEmail
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Messaging IMIMIM
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Messaging Push EmailPush Email-
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Messaging Push Mail-Push Mail
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JavaYes, via Java MIDP emulatorNo
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Sensors-Accelerometer, compass, proximity
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Browser
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HTMLYesHTML5
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Battery
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Battery typeLi-IonLi-Ion
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Battery capacity-2350 mAh
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Talk time4 h 30 min-
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Standby time230 h-