Microsoft Lumia 640 LTE Dual SIM vs Xiaomi Mi Pad 7.9
Microsoft Lumia 640 LTE Dual SIM
Xiaomi Mi Pad 7.9
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Network
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2G networkGSM 850, 900, 1800, 1900
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3G networkHSDPA 850, 900, 1700, 1900, 2100-
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HSDPA speed42.2 Mbps-
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HSUPA speed5.76 Mbps-
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LTE speedLTE, Cat4, 150 Mbps download, 50 Mbps upload-
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GPRSYes
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EDGEYes
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Availability
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Oficially announced2015-32014-3
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Status2015-42014-6
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Design
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SIMDual SIM (Micro-SIM, dual stand-by)No
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Height141.3 mm202 mm
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Width72.2 mm135.4 mm
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Thickness8.8 mm8.5 mm
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Weight145 g360 g
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ColorsGlossy cyan, Matte black, Orange, WhiteBlue, Gray, Green, Pink, White, Yellow
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Display
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Display typeIPS LCD capacitive touchscreenIPS LCD capacitive touchscreen
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Physical size5.0 inches7.9 inches
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Resolution720 x 1280 pixels1536 x 2048 pixels
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Pixel density294 ppi324 ppi
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Display colors1677721616777216
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Hardware
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CPUQuad-core 1.2 GHz ARM Cortex-A7Quad-core 2.2 GHz ARM Cortex-A15
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ChipsetQualcomm Snapdragon 400Nvidia Tegra K1
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GPUAdreno 305ULP GeForce Kepler (192 cores)
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Memory RAM1 GB2 GB
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Internal storage8 GB16, 64 GB
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Memory cardmicroSDmicroSD
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Memory card max128 GB128 GB
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OS
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OSMicrosoft Windows Phone 8.1 with Lumia DenimAndroid OS
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Main camera
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Camera type-Photo / Video
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Main camera8 MP8 MP
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Primary camera resolution3264 x 2448 pixels3264 x 2448 pixels
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Primary camera video1080p@30fps1080p
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Primary camera Autofocusautofocus-
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Primary camera flashLED flash-
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Camera features1/4'' sensor size-
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Selfie camera
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Selfie camera1 MP5 MP
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Selfie camera video720p-
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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; 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 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac
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WLAN WiFi HotspotYesYes
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WLAN WiFi Direct-Yes
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WLAN WiFi Dual Band-Yes
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WLAN DLNAYes-
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USBmicroUSB 2.0microUSB 2.0
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USB On-The-Go-Yes
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Bluetoothv4.0v4.0
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Bluetooth A2DPYes-
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GPSYes, with A-GPSNo
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GLONASSYes-
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GPS NavigatorBeidou-
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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 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, proximity-
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Browser
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HTMLHTML5HTML5
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Battery
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Battery typeLi-IonLi-Po
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Battery capacity2500 mAh6700 mAh
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Talk time-11 h
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Talk time 2G26 h 30 min-
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Talk time 3G17 h 30 min-
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Standby time--
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Standby time 2G864 h-
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Standby time 3G864 h-
