Acer Iconia B1-721 vs Oppo A31 (2015)
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Acer Iconia B1-721
Oppo A31 (2015)
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Network
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2G networkGSM 850, 900, 1800, 1900GSM 850, 900, 1800, 1900
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3G networkHSDPATD-SCDMA 1880, 2010
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HSDPA speedHSDPA-
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HSUPA speedHSUPA-
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LTE speed-LTE, Cat4, 150 Mbps download, 50 Mbps upload
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GPRSYesYes
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EDGEYesYes
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Availability
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Status2014-12015
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Oficially announced2014-12015-4
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Design
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SIMYesDual SIM (Nano-SIM/ Micro-SIM, dual stand-by)
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Height199 mm131.9 mm
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Width122.3 mm65.5 mm
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Thickness11.4 mm8 mm
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Weight323 g135 g
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ColorsBlack/RedBlue, White
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Display
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Display typeTFT capacitive touchscreenIPS LCD 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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Hardware
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CPUDual-core 1.3 GHzQuad-core ARM Cortex-A53
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ChipsetMediatek MT8312Qualcomm MSM8916 Snapdragon 410
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GPUMali-400Adreno 306
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Memory RAM1 GB1 GB
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Internal storage16 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, v4.2 (Jelly Bean)Android OS, v4.4 (KitKat)
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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-Geo-tagging
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Selfie camera
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Secondary cameraNo-
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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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NotificationsN/AVibration; MP3, WAV ringtones
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Multimedia
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RadioNo-
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Connectivity
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WLANWi-Fi 802.11b, 802.11g, 802.11nWi-Fi
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USBmicroUSB 2.0microUSB 2.0
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BluetoothYesv4.0
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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 IMIM-
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Messaging Push EmailPush EmailPush Email
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JavaYes, via Java MIDP emulatorNo
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Sensors-Accelerometer, proximity
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Browser
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HTMLHTML5Yes
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Battery
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Battery typeLi-PoLi-Ion
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Battery capacity2955 mAh2000 mAh
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Talk time-7 h
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Standby time-240 h
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