Microsoft Lumia 640 Dual SIM vs Nokia Lumia 830
Microsoft Lumia 640 Dual SIM
Nokia Lumia 830
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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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HSDPA speed42.2 Mbps42.2 Mbps
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HSUPA speed5.76 Mbps5.76 Mbps
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LTE speed-LTE, 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 announced2015-32014-9
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Status2015-42014-9
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Design
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SIMDual SIM (Micro-SIM, dual stand-by)Nano-SIM
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Height141.3 mm139.4 mm
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Width72.2 mm70.7 mm
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Thickness8.8 mm8.5 mm
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Weight145 g150 g
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ColorsGlossy cyan, Matte black, Orange, WhiteOrange, black, gold, green, white
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Display
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Display typeIPS LCD capacitive touchscreenIPS LCD capacitive touchscreen
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Physical size5.0 inches5.0 inches
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Resolution720 x 1280 pixels720 x 1280 pixels
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Pixel density294 ppi294 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 1.2 GHz ARM Cortex-A7
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ChipsetQualcomm Snapdragon 400Qualcomm Snapdragon 400
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GPUAdreno 305Adreno 305
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Memory RAM1 GB1 GB
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Internal storage8 GB16 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 DenimMicrosoft Windows Phone 8.1
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Main camera
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Camera type-Photo / Video
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Main camera8 MP10 MP
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Primary camera resolution3264 x 2448 pixels3520 x 2640 pixels
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Primary camera video1080p@30fps1080p@30fps
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Primary camera optics-Carl Zeiss optics
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Primary camera Autofocusautofocusautofocus
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Primary camera flashLED flashLED flash
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Primary camera video optical stabilization-optical stabilization
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Primary camera optical image stabilization-optical image stabilization
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Primary camera video stereo sound record-stereo sound record
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Camera features1/4'' sensor size1/3.4'' sensor size, PureView technology, face detection, geo-tagging, panorama
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Selfie camera
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Selfie camera1 MP0.9 MP
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Selfie camera video720p720p
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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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Multimedia
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Radio FMFM radioFM 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
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WLAN WiFi HotspotYesYes
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WLAN WiFi Dual Band-Yes
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WLAN DLNAYesYes
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USBmicroUSB 2.0microUSB 2.0
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Bluetoothv4.0v4.0
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Bluetooth A2DPYesYes
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bluetooth LE-Yes
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Bluetooth EDR-Yes
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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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GPS NavigatorBeidouBeidou
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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 Email
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JavaNoNo
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SensorsAccelerometer, compass, proximityAccelerometer, compass, gyro, proximity
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Browser
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HTMLHTML5HTML5
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Battery
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Battery typeLi-IonLi-Ion
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Battery capacity2500 mAh2200 mAh
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Talk time 2G27 h 30 min12 h 54 min
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Talk time 3G20 h 30 min14 h 48 min
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Standby time-528 h
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Standby time 2G840 h-
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Standby time 3G840 h-
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