Celkon A21 vs Microsoft Surface
Celkon A21
Microsoft Surface
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Network
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2G networkGSM 900, 1800
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3G networkHSDPA 2100-
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HSDPA speedHSDPA-
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GPRSYes
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EDGEYes
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Availability
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Oficially announced2014-122012-10
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Status2014-122012-11
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Design
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SIMDual SIM (dual stand-by)No
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Height124.8 mm274.6 mm
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Width66.1 mm172 mm
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Thickness10.8 mm9.4 mm
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Weight115.3 g680.4 g
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ColorsBlack, Blue, RedDark Titanium
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Display
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Display typeCapacitive touchscreenTFT capacitive touchscreen
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Physical size4.0 inches10.6 inches
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Resolution320 x 480 pixels1366 x 768 pixels
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Pixel density144 ppi148 ppi
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Display colors-16777216
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Hardware
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CPUDual-core 1.2 GHzQuad-core 1.3 GHz ARM Cortex-A9
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ChipsetMediatek MT6582Nvidia Tegra 3 T30
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GPU-ULP GeForce
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Memory ROM512 MB-
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Memory RAM256 MB2 GB
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Internal storage-32, 64 GB
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Memory cardmicroSDmicroSD
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Memory card max32 GB64 GB
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OS
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OSAndroid OS, v4.2.2 (Jelly Bean)Microsoft Windows 8 RT
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Main camera
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Main camera3.15 MP1.2 MP
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Primary camera resolution-1280 x 800 pixels
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Primary camera videovideo720p
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Selfie camera
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Selfie camera1.3 MP1.2 MP
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Selfie camera video-720p@30fps
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Sound
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3.5mm jackYesYes
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LoudspeakerYesYes, with stereo speakers
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NotificationsVibration, Polyphonic, MP3 ringtonesVibration, MP3 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-FiWi-Fi 802.11a, 802.11b, 802.11g, 802.11n
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WLAN WiFi Direct-Yes
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WLAN WiFi Dual Band-Yes
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USBYes2.0
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USB host-Yes
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Bluetoothv4.0v4.0
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Bluetooth A2DP-Yes
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GPSNoNo
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Features
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Messaging SMSSMS(threaded view)-
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Messaging MMSMMS-
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Messaging EmailEmailEmail
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Messaging IM-IM
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Messaging Push Email-Push Email
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JavaYes, via Java MIDP emulatorNo
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Browser
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HTMLYesHTML5
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Battery
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Battery typeLi-IonLi-Ion
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Battery capacity1500 mAh-
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Battery removable-Non-removable
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Talk time-8 h
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Talk time 3G8 h-
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Standby time-360 h
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Standby time 3G120 h-
