Allview AX4 Nano vs Karbonn A21
Allview AX4 Nano
Karbonn A21
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Network
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2G networkGSM 900, 1800, 1900GSM 900, 1800, 1900
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3G networkHSDPA 900, 2100HSDPA 2100
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HSDPA speedHSDPAHSDPA, 7.2 Mbps
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HSUPA speedHSUPA-
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GPRSYesYes
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EDGEYesYes
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Availability
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Oficially announced2014-12014-12
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Status2014-1
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Design
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SIMYesDual SIM (Mini-SIM)
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Height190.9 mm
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Width107.8 mm
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Thickness9.3 mm
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Weight256.2 g
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ColorsBlack, WhitePearl White
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Display
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Display typeCapacitive touchscreenTFT capacitive touchscreen
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Physical size7.0 inches4.5 inches
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Resolution480 x 800 pixels480 x 800 pixels
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Pixel density133 ppi207 ppi
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Display colors16777216262144
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Hardware
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CPUDual-core 1.3 GHz ARM Cortex-A7Dual-core 1.2 GHz
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GPUMali-400-
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Internal storage4 GB4 GB
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Memory RAM512 MB512 MB
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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, v4.0 (Ice Cream Sandwich)
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Main camera
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Main camera3.15 MP5 MP
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Primary camera resolution2048 x 1536 pixels2592 x 1944 pixels
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Primary camera videovideovideo
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Primary camera Autofocus-autofocus
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Primary camera flash-LED flash
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Selfie camera
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Selfie camera1 MP1.3 MP
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Sound
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3.5mm jackYesYes
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LoudspeakerYesYes
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NotificationsVibration, MP3 ringtonesVibration, MP3, WAV ringtones
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Multimedia
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Radio-No
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Radio FMFM 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 HotspotYes-
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WLAN WiFi DirectYes-
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USBmicroUSB 2.0microUSB 2.0
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Bluetoothv4.0v2.1
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Bluetooth A2DPYesYes
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Bluetooth EDRYes-
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GPSYes, with A-GPSYes, 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 EmailPush Email
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JavaYes, via Java MIDP emulatorYes, via Java MIDP emulator
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Browser
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HTMLYesYes
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Battery
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Battery typeLi-PoLi-Ion
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Battery capacity-1800 mAh
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Battery removableNon-removable-
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Talk time4 h5 h
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Standby time250 h200 h
