BLU Ultra vs Celkon A20
BLU Ultra
Celkon A20
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Network
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2G networkGSM 850, 1900GSM 900, 1800
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3G network-HSDPA 2100
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Speed Yes-Yes, 384 kbps
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GPRSYes
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EDGEYes
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Availability
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Oficially announced20112013-8
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Status2013-8
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Design
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SIMMini-SIMDual SIM (Mini-SIM)
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Height105.5 mm
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Width45 mm
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Thickness12.7 mm
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Weight
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ColorsBlack, Blue, Red, YellowBlack
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Display
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Display typeMonochrome graphicTFT capacitive touchscreen
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Physical size1.31 inches4.0 inches
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Resolution96 x 64 pixels480 x 800 pixels
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Pixel density88 ppi233 ppi
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Hardware
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CPUDual-core 1.2 GHz
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Memory ROM-256 MB
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Internal storage16 MB-
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Memory RAM-512 MB
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Memory cardmicroSDmicroSD
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Memory card max4 GB32 GB
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Sound
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3.5mm jackNoYes
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LoudspeakerYesYes
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NotificationsVibration, PolyphonicVibration, Polyphonic, MP3 ringtones
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Multimedia
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Radio FMFM radio-
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Connectivity
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WLANWi-Fi 802.11b, 802.11g, 802.11n
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USBYesmicroUSB 2.0
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BluetoothYes
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GPSNoNo
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Features
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Messaging SMSSMSSMS(threaded view)
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Messaging MMS-MMS
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Messaging Email-Email
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Messaging IM-IM
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Messaging Push Email-Push Email
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JavaNoYes, via Java MIDP emulator
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Browser
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HTML-Yes
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BrowserNo-
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Battery
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Battery typeLi-IonLi-Ion
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Battery capacity500 mAh1500 mAh
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Talk time8 h-
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Standby time400 h-
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OS
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OS-Android OS, v4.2.0 (Jelly Bean)
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Main camera
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Main camera3.15 MP
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Primary camera resolution-2048 x 1536 pixels
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Primary camera video-video
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Selfie camera
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Secondary camera-VGA camera
