Samsung Galaxy Tab 7.7 LTE I815 vs vivo Y28
Samsung Galaxy Tab 7.7 LTE I815
vivo Y28
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Network
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2G networkCDMA 800, 1900GSM 850, 900, 1800, 1900
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3G networkCDMA2000 1xEV-DOHSDPA 850, 900, 2100
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4G networkLTE 700 MHz Class 13-
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HSDPA speed-21.1 Mbps
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HSUPA speed-5.76 Mbps
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EV-DO speed3.1 Mbps-
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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 announced2012-12014-12
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Status20122014-12
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Design
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SIMMini-SIMMicro-SIM
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Height196.6 mm137.4 mm
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Width133.1 mm68.6 mm
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Thickness7.9 mm9.8 mm
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Weight340.2 g156 g
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ColorsMetallic Gray and WhiteWhite
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Display
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Display typeSuper AMOLED Plus capacitive touchscreenIPS LCD capacitive touchscreen
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Physical size7.7 inches4.7 inches
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Resolution800 x 1280 pixels540 x 960 pixels
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Pixel density196 ppi216 ppi
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Display colors1677721616777216
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Hardware
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CPUDual-core 1.4 GHzQuad-core 1.3 GHz
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ChipsetExynos 4210Mediatek MT6582
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GPUMali-400-
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Memory RAM1 GB1 GB
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Internal storage16, 32 GB8 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, v3.2 (Honeycomb)Android OS, v4.2.2 (Jelly Bean)
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Main camera
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Main camera3.15 MP8 MP
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Primary camera resolution2048 x 1536 pixels3264 x 2448 pixels
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Primary camera video720p1080p@30fps
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Primary camera Autofocusautofocusautofocus
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Primary camera flashLED flashLED flash
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Camera features-Geo-tagging, face detection, touch focus
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Selfie camera
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Selfie camera2 MP5 MP
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Sound
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3.5mm jackYesYes
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LoudspeakerYes, with stereo speakersYes
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NotificationsN/AVibration; MP3, WAV ringtones
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Multimedia
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RadioNo-
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Radio FM-FM 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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USB2.0microUSB 2.0
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Bluetoothv3.0v4.0
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Bluetooth A2DPYesYes
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Bluetooth EDR-Yes
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Infrared-Yes
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GPSYes, with A-GPSYes, with A-GPS
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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 MailPush Mail
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JavaYes, via Java MIDP emulatorYes, via Java MIDP emulator
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Sensors-Accelerometer, compass, proximity
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Browser
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HTMLHTML5HTML5
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Adobe FlashYes-
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Battery
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Battery typeLi-IonLi-Po
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Battery capacity5100 mAh2100 mAh
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Battery removableNon-removable-
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Talk time 2G-14 h
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Talk time 3G13 h13 h
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Standby time 2G-430 h
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Standby time 3G392 h430 h