Asus Zenfone Selfie ZD551KL vs Panasonic T21
Asus Zenfone Selfie ZD551KL
Panasonic T21
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Network
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2G networkGSM 850, 900, 1800, 1900GSM 850, 900, 1800, 1900
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3G networkHSDPA 850, 900, 1900, 2100HSDPA 900, 2100
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HSDPA speed42.2 MbpsHSDPA
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HSUPA speed5.76 MbpsHSUPA
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LTE speedLTE, Cat4, 150 Mbps download, 50 Mbps upload-
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GPRSYesYes
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EDGEYesYes
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Availability
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Oficially announced2015-62013
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Status20152013
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Design
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SIMDual SIM (Micro-SIM, dual stand-by)Dual SIM
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Height156.5 mm132 mm
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Width77.2 mm66 mm
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Thickness10.8 mm9.8 mm
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Weight170 g140 g
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ColorsAqua Blue, Chic Pink, Pure WhiteBlack, White
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Display
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Display typeIPS capacitive touchscreenIPS LCD capacitive touchscreen
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Physical size5.5 inches4.5 inches
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Resolution1080 x 1920 pixels720 x 1280 pixels
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Pixel density403 ppi326 ppi
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Display colors1677721616777216
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Hardware
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CPUQuad-core ARM Cortex-A53Dual-core 1.2 GHz
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CPU(second)quad-core ARM Cortex-A53
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ChipsetQualcomm MSM8939 Snapdragon 615-
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GPUAdreno 405-
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Memory RAM2, 3 GB1 GB
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Internal storage16, 32 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 OS, v5.0 (Lollipop)Android OS, v4.1 (Jelly Bean)
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Main camera
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Main camera13 MP8 MP
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Primary camera resolution4128 x 3096 pixels3264 x 2448 pixels
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Primary camera video1080p@30fps1080p@30fps
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Primary camera Autofocus-autofocus
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Primary camera flashdual-LED (dual tone) flashLED flash
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Primary camera laser autofocuslaser autofocus-
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Camera featuresGeo-tagging, HDR, face detection, panorama, touch focus-
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Selfie camera
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Flashdual-LED (dual tone) flash-
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Selfie camera13 MP2 MP
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Secondary camera autofocusautofocus-
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Selfie camera video1080p-
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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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Connectivity
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WLANWi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11acWi-Fi 802.11b, 802.11g, 802.11n
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WLAN WiFi HotspotYesYes
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WLAN WiFi DirectYes-
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USBmicroUSB 2.0microUSB 2.0
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USB hostYes-
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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 Mail
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JavaNoYes, via Java MIDP emulator
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SensorsAccelerometer, compass, gyro, proximity-
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Browser
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HTMLHTML5HTML5
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Battery
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Battery typeLi-PoLi-Ion
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Battery capacity3000 mAh1700 mAh
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Talk time--
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Standby time--
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Multimedia
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Radio FM-FM radio
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