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Specifications
 

Microsoft Lumia 640 LTE

Nokia Lumia 830

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

Nokia Lumia 830

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 / 2100 HSDPA 850 / 900 / 1900 / 2100
  HSDPA 850 / 1700(AWS) / 1900 / 2100 - T-Mobile
4G Network LTE band 1(2100), 3(1800), 7(2600), 8(900), 20(800) LTE band 1(2100), 3(1800), 7(2600), 8(900), 20(800)
  LTE band 1(2100), 2(1900), 4(1700/2100), 5(850), 7(2600), 12(700), 17(700) - T-Mobile LTE band 2(1900), 4(1700/2100), 5(850), 17(700) - AT&T
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 2015, March 2014, September
Status Available. Released 2015, April Available. Released 2014, September
Body
Dimensions 141.3 x 72.2 x 8.8 mm (5.56 x 2.84 x 0.35 in) 139.4 x 70.7 x 8.5 mm (5.49 x 2.78 x 0.33 in)
Weight 145 g (5.11 oz) 150 g (5.29 oz)
SIM Micro-SIM Nano-SIM
Display
Type IPS LCD capacitive touchscreen, 16M colors IPS LCD capacitive touchscreen, 16M colors
Size 5.0 inches, 68.9 cm2 (~67.6% screen-to-body ratio) 5.0 inches, 68.9 cm2 (~69.9% 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 MSM8926 Snapdragon 400 (28 nm) Qualcomm 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 microSD, up to 256 GB (dedicated slot) microSD, up to 256 GB (dedicated slot)
Internal 8GB 1GB RAM 16GB 1GB RAM
Main Camera
Modules 8 MP, f/2.2, 28mm (wide), 1/4", AF 10 MP, f/2.2, 26mm (wide), 1/3.4", AF, OIS
Features LED flash Zeiss optics, LED flash, panorama
Video 1080p@30fps 1080p@30fps, stereo sound rec.
Selfie Camera
Modules 1 MP 0.9 MP
Video 720p 720p
Sound
Loudspeaker Yes Yes
3.5mm jack Yes Yes
  Dolby Digital Plus sound
Active noise cancellation with dedicated mic
Comms
WLAN Wi-Fi 802.11 b/g/n, DLNA, hotspot Wi-Fi 802.11 a/b/g/n, dual-band, DLNA, hotspot
Bluetooth 4.0, A2DP 4.0, A2DP, EDR, LE, aptX
GPS Yes, with A-GPS, GLONASS, BDS Yes, with A-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, proximity, compass Accelerometer, gyro, proximity, compass
Battery
  Removable Li-Ion 2500 mAh battery Removable Li-Ion 2200 mAh battery (BV-L4A)
Charging Qi wireless charging
Stand-by Up to 864 h (2G) / Up to 864 h (3G) Up to 528 h
Talk time Up to 26 h 30 min (2G) / Up to 17 h 30 min (3G) Up to 12 h 54 min (2G) / Up to 14 h 48 min (3G)
Music play Up to 78 h
Misc
Colors Glossy cyan, Orange, White, Matte black Orange, green, white, black, gold
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 120 EUR About 330 EUR
Tests
Performance Basemark OS II: 478
Display Contrast ratio: 1034 (nominal), 2.563 (sunlight) Contrast ratio: 1078 (nominal), 1887 (sunlight)
Camera Compare PHOTO / Compare VIDEO
Loudspeaker Voice 70dB, noise 65dB, ring 75dB Voice 65dB, noise 66dB, ring 78dB
Audio quality Noise -93.1dB / Crosstalk -93.2dB Noise -89.7dB / Crosstalk -91.6dB
Battery life Endurance rating 76h Endurance rating 68h

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