Acer Iconia B1-721 vs Lava A51
Acer Iconia B1-721
Lava A51
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Network
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2G networkGSM 850, 900, 1800, 1900GSM 900, 1800
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3G networkHSDPAHSDPA 900, 2100
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HSDPA speedHSDPA-
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HSUPA speedHSUPA-
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HSPA speed-HSPA
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GPRSYesYes
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EDGEYesYes
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Availability
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Oficially announced2014-12016-10
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Status2014-12016-10
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Design
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SIMYesDual SIM
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Height199 mm136 mm
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Width122.3 mm66 mm
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Thickness11.4 mm9.9 mm
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Weight323 g
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ColorsBlack/RedBlack, Gold, Gray
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Display
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Display typeTFT capacitive touchscreenTFT capacitive touchscreen
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Physical size7.0 inches4.5 inches
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Resolution600 x 1024 pixels480 x 854 pixels
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Pixel density170 ppi218 ppi
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Display colors-16777216
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Multitouch-Yes
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Hardware
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CPUDual-core 1.3 GHzQuad-core 1.2 GHz
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ChipsetMediatek MT8312Spreadtrum SC7731C
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GPUMali-400-
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Memory RAM1 GB512 MB
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Internal storage16 GB8 GB
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Memory cardmicroSDmicroSD
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Memory card max32 GB32 GB
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OS
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OSAndroid OS, v4.2 (Jelly Bean)Android OS, v6.0 (Marshmallow)
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Main camera
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Main camera5 MP
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Primary camera resolution640 x 480 pixels-
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Primary camera videovideovideo
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Primary camera flash-LED flash
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Camera features-Geo-tagging, panorama
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Selfie camera
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Secondary cameraNoVGA camera
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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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USBmicroUSB 2.0microUSB 2.0
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BluetoothYesv2.1
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Bluetooth EDR-Yes
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GPSYesYes, with A-GPS
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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 Email-
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JavaYes, via Java MIDP emulatorNo
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Sensors-Accelerometer
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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 capacity2955 mAh1750 mAh
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Talk time--
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Talk time 3G-10 h 30 min
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Standby time--
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Standby time 3G-420 h
