Screen size
Lumia 5504.7"
Lumia 640 LTEWinner: 5.0"+6%
Quick verdict
Lumia 640 LTE leads the measured specs 7-3.
Measured wins
Lumia 550
3
spec wins
Ties
7
equal specs
Lumia 640 LTE
7
spec wins
Overall winner
Screen size
Technology
Lumia 550
GSM / HSPA / LTE
Lumia 640 LTE
GSM / HSPA / LTE
2G bands
Lumia 550
GSM 850 / 900 / 1800 / 1900
Lumia 640 LTE
GSM 850 / 900 / 1800 / 1900
3G bands
Lumia 550
HSDPA 850 / 900 / 2100
Lumia 640 LTE
HSDPA 850 / 900 / 2100 , HSDPA 850 / 1700(AWS) / 1900 / 2100 - T-Mobile
4G bands
Lumia 550
1, 3, 7, 8, 20
Resolution
equal specsRefresh rate
Peak brightness
Pixel density
CPU speed
RAM
equal specsStorage
equal specsMain camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
equal specs5G support
equal specsNFC
3.5mm jack
equal specsSD card
equal specsStereo speakers
Lumia 640 LTE
1, 3, 7, 8, 20, 1, 2, 4, 5, 7, 12, 17 - T-Mobile
Speed
Lumia 550
HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps
Lumia 640 LTE
HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps
Announced
Lumia 550
2015, October. Released 2015, December
Lumia 640 LTE
2015, March. Released 2015, April
Status
Lumia 550
Discontinued
Lumia 640 LTE
Discontinued
Dimensions
Lumia 550
136.1 x 67.8 x 9.9 mm (5.36 x 2.67 x 0.39 in)
Lumia 640 LTE
141.3 x 72.2 x 8.8 mm (5.56 x 2.84 x 0.35 in)
Weight
Lumia 550
141.9 (5.01 oz)
Lumia 640 LTE
145 g (5.11 oz)
SIM
Lumia 550
Nano-SIM
Lumia 640 LTE
Micro-SIM
Type
Lumia 550
IPS LCD,
Lumia 640 LTE
IPS LCD
Size
Lumia 550
4.7 inches, 59.7 cm2 (~64.7% screen-to-body ratio)
Lumia 640 LTE
5.0 inches, 68.9 cm2 (~67.6% screen-to-body ratio)
Resolution
Lumia 550
720 x 1280 pixels, 16:9 ratio (~315 ppi density)
Lumia 640 LTE
720 x 1280 pixels, 16:9 ratio (~294 ppi density)
Protection
Lumia 550
-
Lumia 640 LTE
Corning Gorilla Glass 3
Other
Lumia 550
-
Lumia 640 LTE
ClearBlack display
OS
Lumia 550
Microsoft Windows 10
Lumia 640 LTE
Microsoft Windows Phone 8.1, upgradable to Microsoft Windows 10
Chipset
Lumia 550
Qualcomm MSM8909 Snapdragon 210 (28 nm)
Lumia 640 LTE
Qualcomm MSM8926 Snapdragon 400 (28 nm)
CPU
Lumia 550
Quad-core 1.1 GHz Cortex-A7
Lumia 640 LTE
Quad-core 1.2 GHz Cortex-A7
GPU
Lumia 550
Adreno 304
Lumia 640 LTE
Adreno 305
Card slot
Lumia 550
microSDXC (dedicated slot)
Lumia 640 LTE
microSDXC (dedicated slot)
Internal
Lumia 550
8GB 1GB RAM
Lumia 640 LTE
8GB 1GB RAM
Other
Lumia 550
eMMC 4.5
Lumia 640 LTE
eMMC 4.5
Single
Lumia 550
5 MP, f/2.4, 1/4.0", AF
Lumia 640 LTE
8 MP, f/2.2, 28mm (wide), 1/4.0", AF
Features
Lumia 550
LED flash
Lumia 640 LTE
LED flash
Video
Lumia 550
720p@30fps
Lumia 640 LTE
1080p@30fps
Single
Lumia 550
2 MP, f/2.8
Lumia 640 LTE
1 MP
Video
Lumia 550
480p
Lumia 640 LTE
720p
Loudspeaker
Lumia 550
Yes
Lumia 640 LTE
Yes
3.5mm jack
Lumia 550
Yes
Lumia 640 LTE
Yes
WLAN
Lumia 550
Wi-Fi 802.11 b/g/n, hotspot
Lumia 640 LTE
Wi-Fi 802.11 b/g/n, DLNA, hotspot
Bluetooth
Lumia 550
4.1, A2DP
Lumia 640 LTE
4.0, A2DP
Positioning
Lumia 550
GPS, GLONASS, BDS
Lumia 640 LTE
GPS, GLONASS, BDS
NFC
Lumia 550
No
Lumia 640 LTE
Yes
Radio
Lumia 550
FM radio
Lumia 640 LTE
FM radio
USB
Lumia 550
microUSB 2.0
Lumia 640 LTE
microUSB 2.0
Sensors
Lumia 550
Accelerometer, proximity
Lumia 640 LTE
Accelerometer, proximity, compass
Type
Lumia 550
Li-Ion 2100 mAh, removable
Lumia 640 LTE
Li-Ion 2500 mAh, removable
Stand-by
Lumia 550
Up to 672 h (2G) / Up to 672 h (3G)
Lumia 640 LTE
Up to 864 h (2G) / Up to 864 h (3G)
Talk time
Lumia 550
Up to 16 h (2G) / Up to 14 h (3G)
Lumia 640 LTE
Up to 26 h 30 min (2G) / Up to 17 h 30 min (3G)
Music play
Lumia 550
Up to 60 h
Lumia 640 LTE
-
Colors
Lumia 550
Black, White
Lumia 640 LTE
Glossy cyan, Orange, White, Matte black
Price
Lumia 550
About 90 EUR
Lumia 640 LTE
About 120 EUR