HTC Evo 4G vs Karbonn A21
HTC Evo 4G
Karbonn A21
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Network
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2G networkCDMA 800, 1900GSM 900, 1800, 1900
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3G networkCDMA2000 1xEV-DOHSDPA 2100
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HSDPA speed-HSDPA, 7.2 Mbps
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EV-DO speed3.1 Mbps-
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GPRSYes
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EDGEYes
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Availability
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Oficially announced2010-32014-12
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Status2010-6
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Design
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SIMMini-SIMDual SIM (Mini-SIM)
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Height122 mm
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Width66 mm
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Thickness13 mm
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Weight170 g
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ColorsBlack, WhitePearl White
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Display
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Display typeTFT capacitive touchscreenTFT capacitive touchscreen
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Physical size4.3 inches4.5 inches
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Resolution480 x 800 pixels480 x 800 pixels
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Pixel density217 ppi207 ppi
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Display colors66560262144
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Hardware
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CPU1 GHz Scorpion1.2 GHz Dual-core
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ChipsetQualcomm QSD8650 Snapdragon-
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GPUAdreno 200-
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Memory ROM1 GB-
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Memory RAM512 MB512 MB
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Internal storage-4 GB
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Memory cardmicroSDmicroSD
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Memory card max32 GB32 GB
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Memory card included8 GB-
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OS
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OSAndroid OS, v2.1 (Eclair)Android OS, v4.0 (Ice Cream Sandwich)
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Main camera
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Main camera8 MP5 MP
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Primary camera resolution3264 x 2448 pixels2592 x 1944 pixels
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Primary camera video720pvideo
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Primary camera Autofocusautofocusautofocus
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Primary camera flashLED flashLED flash
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Selfie camera
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Selfie camera1.3 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, WAV ringtonesVibration, MP3, WAV ringtones
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Multimedia
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Radio-No
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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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WLAN wimaxWiMAX 802.16 e-
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USBmicroUSB 2.0microUSB 2.0
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Bluetoothv2.1v2.1
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Bluetooth A2DPYesYes
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GPSYes, with A-GPSYes, with A-GPS
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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 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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Adobe FlashYes-
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Battery
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Battery typeLi-IonLi-Ion
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Battery capacity1500 mAh1800 mAh
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Talk time5 h 12 min5 h
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Standby time146 h200 h
