Screen size
equal specsLumia 640 LTE5.0"
Lumia 8505.0"
Quick verdict
Lumia 850 leads the measured specs 4-3.
Measured wins
Lumia 640 LTE
3
spec wins
Ties
10
equal specs
Lumia 850
4
spec wins
Overall winner
Screen size
equal specsTechnology
Lumia 640 LTE
GSM / HSPA / LTE
Lumia 850
GSM / HSPA / LTE
2G bands
Lumia 640 LTE
GSM 850 / 900 / 1800 / 1900
Lumia 850
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only)
3G bands
Lumia 640 LTE
HSDPA 850 / 900 / 2100 , HSDPA 850 / 1700(AWS) / 1900 / 2100 - T-Mobile
Lumia 850
HSDPA 850 / 900 / 1900 / 2100
4G bands
Lumia 640 LTE
1, 3, 7, 8, 20, 1, 2, 4, 5, 7, 12, 17 - T-Mobile
Resolution
equal specsRefresh rate
Peak brightness
Pixel density
equal specsCPU speed
equal specsRAM
equal specsStorage
Main camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
equal specs5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
Lumia 850
LTE
Speed
Lumia 640 LTE
HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps
Lumia 850
HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps
Announced
Lumia 640 LTE
2015, March. Released 2015, April
Lumia 850
Not announced yet
Status
Lumia 640 LTE
Discontinued
Lumia 850
Discontinued
Dimensions
Lumia 640 LTE
141.3 x 72.2 x 8.8 mm (5.56 x 2.84 x 0.35 in)
Lumia 850
-
Weight
Lumia 640 LTE
145 g (5.11 oz)
Lumia 850
-
SIM
Lumia 640 LTE
Micro-SIM
Lumia 850
· Nano-SIM· Nano-SIM + Nano-SIM
Type
Lumia 640 LTE
IPS LCD
Lumia 850
IPS LCD
Size
Lumia 640 LTE
5.0 inches, 68.9 cm2 (~67.6% screen-to-body ratio)
Lumia 850
5.0 inches, 68.9 cm2
Resolution
Lumia 640 LTE
720 x 1280 pixels, 16:9 ratio (~294 ppi density)
Lumia 850
720 x 1280 pixels, 16:9 ratio (~294 ppi density)
Protection
Lumia 640 LTE
Corning Gorilla Glass 3
Lumia 850
(To be confirmed)
Other
Lumia 640 LTE
ClearBlack display
Lumia 850
ClearBlack display
OS
Lumia 640 LTE
Microsoft Windows Phone 8.1, upgradable to Microsoft Windows 10
Lumia 850
Microsoft Windows 10
Chipset
Lumia 640 LTE
Qualcomm MSM8926 Snapdragon 400 (28 nm)
Lumia 850
Qualcomm MSM8916 Snapdragon 410 (28 nm)
CPU
Lumia 640 LTE
Quad-core 1.2 GHz Cortex-A7
Lumia 850
Quad-core 1.2 GHz Cortex-A53
GPU
Lumia 640 LTE
Adreno 305
Lumia 850
Adreno 306
Card slot
Lumia 640 LTE
microSDXC (dedicated slot)
Lumia 850
microSDXC (dedicated slot)
Internal
Lumia 640 LTE
8GB 1GB RAM
Lumia 850
16GB 1GB RAM
Other
Lumia 640 LTE
eMMC 4.5
Lumia 850
eMMC 4.5
Single
Lumia 640 LTE
8 MP, f/2.2, 28mm (wide), 1/4.0", AF
Lumia 850
10 MP, 1/3.4", AF, OIS
Features
Lumia 640 LTE
LED flash
Lumia 850
Carl Zeiss optics, LED flash, panorama
Video
Lumia 640 LTE
1080p@30fps
Lumia 850
1080p@30fps, stereo sound rec.
Single
Lumia 640 LTE
1 MP
Lumia 850
2 MP
Video
Lumia 640 LTE
720p
Lumia 850
Features
Lumia 640 LTE
-
Lumia 850
LED flash
Loudspeaker
Lumia 640 LTE
Yes
Lumia 850
Yes
3.5mm jack
Lumia 640 LTE
Yes
Lumia 850
Yes
WLAN
Lumia 640 LTE
Wi-Fi 802.11 b/g/n, DLNA, hotspot
Lumia 850
Wi-Fi 802.11 a/b/g/n, dual-band, DLNA, hotspot
Bluetooth
Lumia 640 LTE
4.0, A2DP
Lumia 850
4.1, A2DP, EDR, LE, aptX
Positioning
Lumia 640 LTE
GPS, GLONASS, BDS
Lumia 850
GPS, GLONASS, BDS
NFC
Lumia 640 LTE
Yes
Lumia 850
Yes
Radio
Lumia 640 LTE
FM radio
Lumia 850
FM radio
USB
Lumia 640 LTE
microUSB 2.0
Lumia 850
microUSB 2.0
Sensors
Lumia 640 LTE
Accelerometer, proximity, compass
Lumia 850
Accelerometer, gyro, proximity, compass
Type
Lumia 640 LTE
Li-Ion 2500 mAh, removable
Lumia 850
Li-Ion, removable
Stand-by
Lumia 640 LTE
Up to 864 h (2G) / Up to 864 h (3G)
Lumia 850
-
Talk time
Lumia 640 LTE
Up to 26 h 30 min (2G) / Up to 17 h 30 min (3G)
Lumia 850
-
Charging
Lumia 640 LTE
-
Lumia 850
Wireless (Qi)
Colors
Lumia 640 LTE
Glossy cyan, Orange, White, Matte black
Lumia 850
Black
Price
Lumia 640 LTE
About 120 EUR
Lumia 850
-