Alcatel OT-813D vs Celkon A20
Alcatel OT-813D
Celkon A20
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Network
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2G networkGSM 900, 1800GSM 900, 1800
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3G network-HSDPA 2100
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Speed Yes-Yes, 384 kbps
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GPRSYesYes
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EDGEYesYes
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Availability
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Status20112013-8
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Oficially announced2011-52013-8
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Design
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SIMDual SIM (Mini-SIM, dual stand-by)Dual SIM (Mini-SIM)
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Height115 mm
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Width61.1 mm
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Thickness12.9 mm
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Weight101 g
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KeyboardQWERTY-
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ColorsBlack, Blue, Gray, Orange, PurpleBlack
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Display
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Display typeTFT resistive touchscreenTFT capacitive touchscreen
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Physical size2.4 inches4.0 inches
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Resolution320 x 240 pixels480 x 800 pixels
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Pixel density167 ppi233 ppi
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Display colors262144-
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Hardware
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CPU208 MHz1.2 GHz Dual-core
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Memory ROM-256 MB
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Internal storage50 MB-
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Memory RAM-512 MB
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Memory cardmicroSDmicroSD
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Memory card max16 GB32 GB
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Main camera
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Main camera2 MP3.15 MP
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Primary camera resolution1600 x 1200 pixels2048 x 1536 pixels
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Primary camera videoQCIF@15fpsvideo
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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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NotificationsVibration; MP3 ringtonesVibration, Polyphonic, MP3 ringtones
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Multimedia
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Radio FMStereo FM radio with RDS-
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Connectivity
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WLANWi-Fi 802.11b, 802.11gWi-Fi 802.11b, 802.11g, 802.11n
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USBmicroUSB 2.0microUSB 2.0
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Bluetoothv2.1Yes
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Bluetooth A2DPYes-
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GPSNoNo
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Features
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Messaging SMSSMSSMS(threaded view)
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Messaging MMSMMSMMS
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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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WAPWAP 2.0/xHTML-
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JavaYesYes, via Java MIDP emulator
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Java MIDPMIDP 2.1-
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Battery
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Battery typeLi-IonLi-Ion
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Battery capacity1000 mAh1500 mAh
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Talk time10 h-
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Standby time720 h-
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OS
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OS-Android OS, v4.2.0 (Jelly Bean)
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Browser
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HTML-Yes
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