Asus Zenfone 4 A450CG (2014) vs Karbonn A21
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Asus Zenfone 4 A450CG (2014)
Karbonn A21
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Network
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2G networkGSM 850, 900, 1800, 1900GSM 900, 1800, 1900
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3G networkHSDPA 850, 900, 1900, 2100HSDPA 2100
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HSDPA speed42.2 MbpsHSDPA, 7.2 Mbps
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HSUPA speed5.76 Mbps-
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GPRSYesYes
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EDGEYesYes
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Availability
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Oficially announced2014-62014-12
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Status2014-7
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Design
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SIMSingle SIM (Micro-SIM) or Dual SIM (Micro-SIM, dual stand-by)Dual SIM (Mini-SIM)
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Height136.8 mm
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Width67.9 mm
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Thickness11.3 mm
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Weight134 g
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ColorsCharcoal Black, Cherry Red, Pearl White, Sky Blue, Solar YellowPearl White
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Display
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Display typeIPS LCD capacitive touchscreenTFT capacitive touchscreen
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Physical size4.5 inches4.5 inches
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Resolution480 x 854 pixels480 x 800 pixels
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Pixel density218 ppi207 ppi
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Display colors16777216262144
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ProtectionCorning Gorilla Glass 3-
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MultitouchYes-
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Hardware
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CPUDual-core 1.2 GHzDual-core 1.2 GHz
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ChipsetIntel Atom Z2520-
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GPUPowerVR SGX544MP2-
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Memory RAM1 GB512 MB
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Internal storage8 GB4 GB
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Memory cardmicroSDmicroSD
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Memory card max64 GB32 GB
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OS
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OSAndroid 4.4.2 (KitKat)Android OS, v4.0 (Ice Cream Sandwich)
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Main camera
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Main camera8 MP, f/2.05 MP
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Primary camera resolution-2592 x 1944 pixels
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Primary camera video1080p@30fpsvideo
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Primary camera Autofocusautofocusautofocus
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Primary camera flashLED flashLED flash
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Camera featuresGeo-tagging, face detection, panorama, touch focus-
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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, MP3, WAV ringtones
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Multimedia
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Radio-No
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Radio FMFM radio-
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Connectivity
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WLANWi-Fi 802.11b, 802.11g, 802.11nWi-Fi 802.11b, 802.11g, 802.11n
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WLAN WiFi HotspotYes-
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WLAN WiFi DirectYes-
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USBmicroUSB 2.0microUSB 2.0
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Bluetoothv4.0v2.1
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Bluetooth A2DPYesYes
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Bluetooth EDRYes-
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GPSYes, with A-GPSYes, with A-GPS
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GLONASSYes-
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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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JavaNoYes, via Java MIDP emulator
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SensorsAccelerometer, compass, proximity-
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Browser
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HTMLYesYes
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Battery
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Battery typeLi-PoLi-Ion
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Battery capacity1750 mAh1800 mAh
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Battery removableRemovable-
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Talk time-5 h
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Standby time-200 h
