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Specifications
 

Nokia Lumia 830

Microsoft Lumia 640 LTE

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Nokia Lumia 830
MORE PICTURES Microsoft Lumia 640 LTE
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Nokia Lumia 830

Microsoft Lumia 640 LTE

Network
Technology GSM / HSPA / LTE GSM / HSPA / LTE
2G bands GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900
3G Network HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 2100
  HSDPA 850 / 1700(AWS) / 1900 / 2100 - T-Mobile
4G Network 1, 3, 7, 8, 20 1, 3, 7, 8, 20
  2, 4, 5, 17 - AT&T 1, 2, 4, 5, 7, 12, 17 - T-Mobile
Speed HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps
Launch
Announced 2014, September. Released 2014, September 2015, March. Released 2015, April
Status Discontinued Discontinued
Body
Dimensions 139.4 x 70.7 x 8.5 mm (5.49 x 2.78 x 0.33 in) 141.3 x 72.2 x 8.8 mm (5.56 x 2.84 x 0.35 in)
Weight 150 g (5.29 oz) 145 g (5.11 oz)
SIM Nano-SIM Micro-SIM
Display
Type IPS LCD IPS LCD
Size 5.0 inches, 68.9 cm2 (~69.9% screen-to-body ratio) 5.0 inches, 68.9 cm2 (~67.6% screen-to-body ratio)
Resolution 720 x 1280 pixels, 16:9 ratio (~294 ppi density) 720 x 1280 pixels, 16:9 ratio (~294 ppi density)
Protection Corning Gorilla Glass 3 Corning Gorilla Glass 3
 ClearBlack display ClearBlack display
Platform
OS Microsoft Windows Phone 8.1, upgradable to Microsoft Windows 10 Microsoft Windows Phone 8.1, upgradable to Microsoft Windows 10
Chipset Qualcomm Snapdragon 400 (28 nm) Qualcomm MSM8926 Snapdragon 400 (28 nm)
CPU Quad-core 1.2 GHz Cortex-A7 Quad-core 1.2 GHz Cortex-A7
GPU Adreno 305 Adreno 305
Memory
Card slot microSDXC (dedicated slot) microSDXC (dedicated slot)
Internal 16GB 1GB RAM 8GB 1GB RAM
 eMMC 4.5 eMMC 4.5
Main Camera
Modules 10 MP, f/2.2, 26mm (wide), 1/3.4", AF, OIS 8 MP, f/2.2, 28mm (wide), 1/4.0", AF
Features Zeiss optics, LED flash, panorama LED flash
Video 1080p@30fps, stereo sound rec. 1080p@30fps
Selfie Camera
Modules 0.9 MP 1 MP
Video 720p 720p
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Sound
Loudspeaker Yes Yes
3.5mm jack Yes Yes
Comms
WLAN Wi-Fi 802.11 a/b/g/n, dual-band, DLNA, hotspot Wi-Fi 802.11 b/g/n, DLNA, hotspot
Bluetooth 4.0, A2DP, EDR, LE, aptX 4.0, A2DP
Positioning GPS, GLONASS, BDS GPS, GLONASS, BDS
NFC Yes Yes
Infrared port No No
Radio FM radio FM radio
USB microUSB 2.0 microUSB 2.0
Features
Sensors Accelerometer, gyro, proximity, compass Accelerometer, proximity, compass
Battery
Type Li-Ion 2200 mAh, removable (BV-L4A) Li-Ion 2500 mAh, removable
Charging Wireless (Qi)
Stand-by Up to 528 h Up to 864 h (2G) / Up to 864 h (3G)
Talk time Up to 12 h 54 min (2G) / Up to 14 h 48 min (3G) Up to 26 h 30 min (2G) / Up to 17 h 30 min (3G)
Music play Up to 78 h
Misc
Colors Orange, green, white, black, gold Glossy cyan, Orange, White, Matte black
SAR 0.87 W/kg (head)     0.83 W/kg (body)    
SAR EU 0.46 W/kg (head)     0.59 W/kg (body)    
Price About 330 EUR About 120 EUR
Tests
Display Contrast ratio: 1078 (nominal), 1887 (sunlight) Contrast ratio: 1034 (nominal), 2.563 (sunlight)
Camera Compare PHOTO / Compare VIDEO
Loudspeaker Voice 65dB / Noise 66dB / Ring 78dB Voice 70dB / Noise 65dB / Ring 75dB
Audio quality Noise -89.7dB / Crosstalk -91.6dB Noise -93.1dB / Crosstalk -93.2dB
Battery (old) Endurance rating 68h Endurance rating 76h

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