Acer Iconia Tab 8 A1-840FHD vs Xiaomi Redmi 4
Acer Iconia Tab 8 A1-840FHD
Xiaomi Redmi 4
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Network
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2G networkGSM 850, 900, 1800, 1900; CDMA 800, 1900
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3G network-HSDPA 850, 900, 1900, 2100; CDMA2000 1xEV-DO & TD-SCDMA
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4G network-LTE frequency band 1(2100), 3(1800), 7(2600), 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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GPRSYes
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EDGEYes
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Availability
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Oficially announced2014-62016-11
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Status20142016-11
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Design
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SIMNoDual SIM
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Height141.3 mm
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Width69.6 mm
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Thickness8.9 mm
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Weight360 g156 g
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ColorsSilverDark Gray, Gold, Silver
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Display
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Display typeIPS LCD capacitive touchscreenIPS LCD capacitive touchscreen
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Physical size8.0 inches5.0 inches
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Resolution1200 x 1920 pixels720 x 1280 pixels
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Pixel density283 ppi296 ppi
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Display colors1677721616777216
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Multitouch-Yes
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Hardware
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CPUQuad-core 1.86 GHzOcta-core 1.4 GHz ARM Cortex-A53
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ChipsetIntel Atom Z3745Qualcomm MSM8937 Snapdragon 430
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GPU-Adreno 505
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Memory RAM2 GB2 GB
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Internal storage16, 32 GB16 GB
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Memory cardmicroSDmicroSD(uses second SIM slot)
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Memory card max32 GB256 GB
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OS
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OSAndroid OS, v4.4.2 (KitKat)Android OS, v6.0.1 (Marshmallow)
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Main camera
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Primary cameraYes-
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Main camera13 MP, f/2.2
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Primary camera videovideo1080p@30fps
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Primary camera Autofocus-phase detection autofocus
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Primary camera flash-LED flash
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Camera features-Geo-tagging, HDR, face/smile detection, panorama, touch focus
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Selfie camera
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Secondary cameraYes-
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Selfie camera5 MP, f/2.2
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Selfie camera video-1080p
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Sound
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3.5mm jackYesYes
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LoudspeakerYesYes
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NotificationsVibration; MP3, WAV ringtonesVibration; 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 802.11a, 802.11b, 802.11g, 802.11n
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WLAN WiFi Hotspot-Yes
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WLAN WiFi Direct-Yes
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USBmicroUSB 2.0microUSB 2.0
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BluetoothYesv4.1
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Bluetooth A2DP-Yes
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bluetooth LE-Yes
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Infrared-Yes
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GPS-Yes, with A-GPS
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GLONASS-Yes
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BDS-Yes
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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 EmailEmailEmail
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Messaging IMIMIM
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Messaging Push EmailPush Mail-
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Messaging Push Mail-Push Mail
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JavaYes, via Java MIDP emulatorNo
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Sensors-Fingerprint, accelerometer, compass, gyro, proximity
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Browser
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HTMLHTML5HTML5
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Battery
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Battery type-Li-Ion
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Battery capacity-4100 mAh
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Battery removable-Non-removable
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Fast battery charging-Yes
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Talk time7 h 30 min-
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Standby time--