Apple iPad Air vs HTC Desire 820
Apple iPad Air
HTC Desire 820
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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 850, 900, 1900, 2100
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4G networkLTE-
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HSDPA speed21 Mbps42.2 Mbps
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HSUPA speed5.76 Mbps5.76 Mbps
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DC-HSDPA speed42 Mbps-
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EV-DO speed3.1 Mbps-
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LTE speed100 MbpsLTE, 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 announced2013-102014-9
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Status2013-112014-11
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Design
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SIMNano-SIMNano-SIM
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Height240 mm157.7 mm
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Width169.5 mm78.7 mm
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Thickness7.5 mm7.7 mm
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Weight469 g155 g
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ColorsSilver, Space GrayBlue Misty, Flamingo Grey, Marble White, Milky-way Grey, Monarch Orange, Saffron Grey, Santorini White, Tangerine White, Tuxedo Grey
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Display
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Display typeLED-backlit IPS LCD, capacitive touchscreenLCD capacitive touchscreen
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Physical size9.7 inches5.5 inches
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Resolution1536 x 2048 pixels720 x 1280 pixels
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Pixel density264 ppi267 ppi
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Display colors1677721616777216
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Hardware
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CPUDual-core 1.3 GHz CycloneQuad-core 1.5 GHz ARM Cortex-A53
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ChipsetApple A7Qualcomm MSM8939 Snapdragon 615
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GPUPowerVR G6430 (quad-core graphics)Adreno 405
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Memory RAM1 GB2 GB
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Internal storage16, 32, 64, 128 GB16 GB
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Memory cardmicroSD
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Memory card max-128 GB
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OS
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OSiOS 7Android OS, v4.4.2 (KitKat)
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Main camera
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Camera typePhoto / VideoPhoto / Video
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Main camera5 MP13 MP
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Primary camera resolution2592 x 1944 pixels4160 x 3120 pixels
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Primary camera video1080p@30fps1080p@30fps, 720p@60fps
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Primary camera Autofocusautofocusautofocus
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Primary camera flash-LED flash
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Camera features-Geo-tagging, HDR, face detection, simultaneous HD video and image recording, touch focus
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Selfie camera
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Selfie camera1.2 MP8 MP
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Secondary camera face detectionface detection-
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Secondary camera face timeFaceTime-
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Selfie camera video720p@30fps1080p
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Sound
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3.5mm jackYesYes
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LoudspeakerYes, with stereo speakersYes, with stereo speakers
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NotificationsN/AVibration; MP3, WAV ringtones
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Multimedia
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RadioNo-
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Radio FM-FM radio
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Connectivity
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WLANWi-Fi 802.11a, 802.11b, 802.11g, 802.11nWi-Fi 802.11a, 802.11b, 802.11g, 802.11n
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WLAN WiFi HotspotYesYes
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WLAN WiFi Direct-Yes
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WLAN WiFi Dual BandYesYes
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WLAN DLNA-Yes
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USBLightning, USB 2.0microUSB 2.0
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USB host-Yes
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Bluetoothv4.0v4.0
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Bluetooth A2DPYesYes
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Bluetooth EDRYes-
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Bluetooth AptX-Yes
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GPSYes, with A-GPSYes, with A-GPS
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GLONASSYesYes
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Features
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Messaging SMS-SMS(threaded view)
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Messaging MMS-MMS
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Messaging EmailEmailEmail
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Messaging IMIM-
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Messaging iMessageiMessage-
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Messaging Push EmailPush EmailPush Email
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JavaNoYes, via Java MIDP emulator
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Sensors-Accelerometer, compass, proximity
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Browser
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HTMLHTML (Safari)HTML5
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Battery
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Battery typeLi-PoLi-Po
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Battery capacity8600 mAh2600 mAh
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Battery removableNon-removableNon-removable
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Talk time10 h-
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Talk time 3G-22 h 24 min
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Standby time--
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Standby time 3G-424 h