Allview A4ALL vs Celkon A21
Allview A4ALL
Celkon A21
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Network
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2G networkGSM 900, 1800, 1900GSM 900, 1800
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3G networkHSDPA 900, 2100HSDPA 2100
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HSDPA speedHSDPA, 7.2 MbpsHSDPA
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HSUPA speedHSUPA, 5.76 Mbps-
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GPRSYesYes
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EDGEYesYes
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Availability
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Oficially announced2013-42014-12
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Status2013-42014-12
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Design
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SIMDual SIM (dual stand-by)Dual SIM (dual stand-by)
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Height115 mm124.8 mm
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Width62 mm66.1 mm
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Thickness12.2 mm10.8 mm
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Weight122.7 g115.3 g
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ColorsVariousBlack, Blue, Red
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Display
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Display typeTFT capacitive touchscreenCapacitive touchscreen
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Physical size3.5 inches4.0 inches
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Resolution320 x 480 pixels320 x 480 pixels
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Pixel density165 ppi144 ppi
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Hardware
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CPU1 GHz ARM Cortex-A91.2 GHz Dual-core
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Chipset-Mediatek MT6582
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GPUPowerVR SGX531-
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Memory ROM-512 MB
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Memory RAM256 MB256 MB
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Internal storage512 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, v2.3.6 (Gingerbread)Android OS, v4.2.2 (Jelly Bean)
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Main camera
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Main camera2 MP3.15 MP
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Primary camera resolution1600 x 1200 pixels-
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Primary camera video480p@25fpsvideo
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Selfie camera
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Secondary cameraVGA camera-
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Selfie camera1.3 MP
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Sound
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3.5mm jackYesYes
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LoudspeakerYesYes
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NotificationsVibration, MP3, WAV ringtonesVibration, Polyphonic, MP3 ringtones
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Multimedia
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Radio FMFM Radio with RDSFM radio
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Connectivity
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WLANWi-Fi 802.11b, 802.11g, 802.11nWi-Fi
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WLAN WiFi HotspotYes-
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USBmicroUSB 2.0Yes
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Bluetoothv4.0v4.0
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Bluetooth A2DPYes-
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Bluetooth EDRYes-
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GPSYes, with A-GPSNo
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Features
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Messaging SMSSMS(threaded view)SMS(threaded view)
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Messaging MMSMMSMMS
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Messaging EmailEmailEmail
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Messaging IMIM-
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Messaging Push 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-IonLi-Ion
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Battery capacity1500 mAh1500 mAh
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Talk time5 h-
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Talk time 3G-8 h
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Standby time200 h-
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Standby time 3G-120 h
