Apple Watch Sport 42mm vs Celkon A20
Apple Watch Sport 42mm
Celkon A20
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Network
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2G networkGSM 900, 1800
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3G network-HSDPA 2100
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Speed Yes-Yes, 384 kbps
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GPRSYes
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EDGEYes
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Availability
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Oficially announced2014-92013-8
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Status2015-42013-8
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Design
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BuildAluminum-
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SIMNoDual SIM (Mini-SIM)
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Height42 mm
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Width35.9 mm
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Thickness10.5 mm
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Weight70 g
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ColorsBlue; Gold/White; Gray/Black; Rose Gold/Lavender, Orange, Silver/White, StoneBlack
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Display
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Display typeAMOLED capacitive touchscreenTFT capacitive touchscreen
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Physical size1.65 inches4.0 inches
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Resolution390 x 312 pixels480 x 800 pixels
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Pixel density302 ppi233 ppi
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Display colors16777216-
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Hardware
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CPU520 MHz1.2 GHz Dual-core
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ChipsetApple S1-
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GPUPowerVR SGX543-
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Memory ROM-256 MB
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Memory RAM512 MB512 MB
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Internal storage8 GB-
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Memory cardmicroSD
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Memory card max-32 GB
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OS
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OSwatchOS 1.0Android OS, v4.2.0 (Jelly Bean)
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Sound
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3.5mm jackNoYes
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LoudspeakerYesYes
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NotificationsVibration; RingtonesVibration, Polyphonic, MP3 ringtones
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Multimedia
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RadioNo-
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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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USBmicroUSB 2.0
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Bluetoothv4.0Yes
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bluetooth LEYes-
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GPSNoNo
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Features
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Messaging SMSSMS(threaded view)SMS(threaded view)
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Messaging MMS-MMS
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Messaging EmailEmailEmail
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Messaging IMIMIM
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Messaging Push Email-Push Email
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Messaging Push MailPush Mail-
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JavaNoYes, via Java MIDP emulator
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SensorsAccelerometer, gyro, heart rate-
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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 capacity250 mAh1500 mAh
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Battery removableNon-removable-
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Talk time3 h 40 min-
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Standby time22 h-
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Main camera
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Main camera3.15 MP
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Primary camera resolution-2048 x 1536 pixels
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Primary camera video-video
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Selfie camera
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Secondary camera-VGA camera
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