Alcatel OT-252 vs Karbonn A21
Alcatel OT-252
Karbonn A21
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Network
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2G networkGSM 900, 1800GSM 900, 1800, 1900
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3G network-HSDPA 2100
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HSDPA speed-HSDPA, 7.2 Mbps
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GPRSYes
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EDGEYes
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Availability
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Status2010-6
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Oficially announced2010-22014-12
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Design
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SIMMini-SIMDual SIM (Mini-SIM)
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Height100.5 mm
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Width58 mm
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Thickness12 mm
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Weight
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KeyboardQWERTY-
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ColorsBlackPearl White
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Display
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Display typeTFTTFT capacitive touchscreen
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Physical size1.8 inches4.5 inches
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Resolution160 x 128 pixels480 x 800 pixels
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Pixel density114 ppi207 ppi
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Display colors66560262144
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Hardware
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CPUDual-core 1.2 GHz
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Internal storage4 GB
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Memory RAM-512 MB
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Memory cardmicroSD
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Memory card max-32 GB
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Sound
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3.5mm jackNoYes
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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 with RDS-
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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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Bluetoothv2.1
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Bluetooth A2DP-Yes
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GPSNoYes, with A-GPS
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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 mAh1800 mAh
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Talk time5 h5 h
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Standby time400 h200 h
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OS
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OS-Android OS, v4.0 (Ice Cream Sandwich)
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Main camera
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Main camera5 MP
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Primary camera resolution-2592 x 1944 pixels
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Primary camera video-video
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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 camera1.3 MP
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