Acer Iconia Tab B1-A71 vs Microsoft Lumia 640 LTE Dual SIM
Acer Iconia Tab B1-A71
Microsoft Lumia 640 LTE Dual SIM
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Network
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2G networkGSM 850, 900, 1800, 1900
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3G network-HSDPA 850, 900, 1700, 1900, 2100
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HSDPA speed-42.2 Mbps
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HSUPA speed-5.76 Mbps
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LTE speed-LTE, Cat4, 150 Mbps download, 50 Mbps upload
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GPRSYes
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EDGEYes
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Availability
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Oficially announced2013-12015-3
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Status2013-12015-4
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Design
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SIMNoDual SIM (Micro-SIM, dual stand-by)
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Height197.4 mm141.3 mm
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Width128.5 mm72.2 mm
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Thickness11.3 mm8.8 mm
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Weight320 g145 g
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ColorsBlackGlossy cyan, Matte black, Orange, White
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Display
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Display typeTFT capacitive touchscreenIPS LCD capacitive touchscreen
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Physical size7.0 inches5.0 inches
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Resolution600 x 1024 pixels720 x 1280 pixels
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Pixel density170 ppi294 ppi
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Display colors26214416777216
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Hardware
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CPUDual-core 1.2 GHz ARM Cortex-A9Quad-core 1.2 GHz ARM Cortex-A7
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ChipsetMediatek MT8317Qualcomm Snapdragon 400
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GPUSGX531uAdreno 305
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Memory RAM512 MB1 GB
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Internal storage8, 16 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, v4.1 (Jelly Bean)Microsoft Windows Phone 8.1 with Lumia Denim
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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 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-1/4'' sensor size
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Selfie camera
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Secondary cameraNo-
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Selfie camera1 MP
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Selfie camera video-720p
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Sound
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3.5mm jackYesYes
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LoudspeakerYesYes
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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 Hotspot-Yes
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WLAN DLNA-Yes
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USBmicroUSB 2.0microUSB 2.0
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Bluetoothv4.0v4.0
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Bluetooth A2DP-Yes
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GPSYesYes, with A-GPS
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GLONASS-Yes
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GPS Navigator-Beidou
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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 EmailPush Email
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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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HTMLHTML5HTML5
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Battery
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Battery typeLi-PoLi-Ion
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Battery capacity2710 mAh2500 mAh
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Battery removableNon-removable-
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Talk time--
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Talk time 2G-26 h 30 min
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Talk time 3G-17 h 30 min
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Standby time--
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Standby time 2G-864 h
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Standby time 3G-864 h
