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Microsoft Lumia 640 LTE Dual SIM
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Phone Insight
Full Specifications September 3, 2026
Microsoft Lumia 640 LTE Dual SIM
Microsoft · 2015

Microsoft Lumia 640 LTE Dual SIM

Microsoft Lumia 640 LTE Dual SIM Windows Mobile smartphone. Announced Mar 2015. Features 5.0″ display, Snapdragon 400 chipset, 8 MP primary camera, 1 MP front camera, 2500 mAh battery, 8 GB storage, 1000 MB RAM, Corning Gorilla Glass 3.

Display 5.0"
Chipset Snapdragon 400
RAM 1 GB
Storage 8GB storage, microSDXC
Camera 8 MP
Battery 2500 mAh
OS Microsoft Windows Phone 8.1
Build 145g, 8.8mm thickness

Launch

Announced 2015, March. Released 2015, April
Status Discontinued

Platform

OS Microsoft Windows Phone 8.1, upgradable to Microsoft Windows 10
Chipset Qualcomm MSM8926 Snapdragon 400 (28 nm)
CPU Quad-core 1.2 GHz Cortex-A7
GPU Adreno 305

Display

Type IPS LCD
Size 5.0 inches, 68.9 cm 2 (~67.6% screen-to-body ratio)
Resolution 720 x 1280 pixels, 16:9 ratio (~294 ppi density)
Protection Corning Gorilla Glass 3
displayother ClearBlack display

Memory

Card slot microSDXC (dedicated slot)
Internal 8GB 1GB RAM
memoryother eMMC 4.5

Main Camera

Single 8 MP, f/2.2, 28mm (wide), 1/4.0", AF
Features LED flash
Video 1080p@30fps

Selfie camera

Single 1 MP
Video 720p

Body

Dimensions 141.3 x 72.2 x 8.8 mm (5.56 x 2.84 x 0.35 in)
Weight 145 g (5.11 oz)
SIM Dual SIM (Micro-SIM, dual stand-by)

Battery

Type Li-Ion 2500 mAh, removable
Stand-by Up to 864 h (2G) / Up to 864 h (3G)
Talk time Up to 26 h 30 min (2G) / Up to 17 h 30 min (3G)

Sound

Loudspeaker Yes
3.5mm jack Yes

Comms

WLAN Wi-Fi 802.11 b/g/n, DLNA, hotspot
Bluetooth 4.0, A2DP
Positioning GPS, GLONASS, BDS
NFC Yes
Radio FM radio
USB microUSB 2.0

Network

Technology GSM / HSPA / LTE
2G bands GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands HSDPA 850 / 900 / 1700 / 1900 / 2100
4G bands 1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 28, 38, 40
Speed HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps

Features

Sensors Accelerometer, proximity, compass

Our Tests

Display Contrast ratio: 1034 (nominal), 2.563 (sunlight)
Loudspeaker Voice 70dB / Noise 65dB / Ring 75dB
Audio quality Noise -93.1dB / Crosstalk -93.2dB
Battery (old) Endurance rating 76h

Misc

Colors Glossy cyan, Orange, White, Matte black
Phone Insight phoneinsight.org/ Printed September 3, 2026

For live pricing, photos, and comparisons, visit phoneinsight.org/phones/microsoft-lumia-640-lte-dual-sim/

In depth

Full specifications

Announced 2015, March. Released 2015, April
Status Discontinued
OS Microsoft Windows Phone 8.1, upgradable to Microsoft Windows 10
Chipset Qualcomm MSM8926 Snapdragon 400 (28 nm)
CPU Quad-core 1.2 GHz Cortex-A7
GPU Adreno 305
Type IPS LCD
Size 5.0 inches, 68.9 cm 2 (~67.6% screen-to-body ratio)
Resolution 720 x 1280 pixels, 16:9 ratio (~294 ppi density)
Protection Corning Gorilla Glass 3
displayother ClearBlack display
Card slot microSDXC (dedicated slot)
Internal 8GB 1GB RAM
memoryother eMMC 4.5
Single 8 MP, f/2.2, 28mm (wide), 1/4.0", AF
Features LED flash
Video 1080p@30fps
Single 1 MP
Video 720p
Dimensions 141.3 x 72.2 x 8.8 mm (5.56 x 2.84 x 0.35 in)
Weight 145 g (5.11 oz)
SIM Dual SIM (Micro-SIM, dual stand-by)
Type Li-Ion 2500 mAh, removable
Stand-by Up to 864 h (2G) / Up to 864 h (3G)
Talk time Up to 26 h 30 min (2G) / Up to 17 h 30 min (3G)
Loudspeaker Yes
3.5mm jack Yes
WLAN Wi-Fi 802.11 b/g/n, DLNA, hotspot
Bluetooth 4.0, A2DP
Positioning GPS, GLONASS, BDS
NFC Yes
Radio FM radio
USB microUSB 2.0
Technology GSM / HSPA / LTE
2G bands GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands HSDPA 850 / 900 / 1700 / 1900 / 2100
4G bands 1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 28, 38, 40
Speed HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps
Sensors Accelerometer, proximity, compass
Display Contrast ratio: 1034 (nominal), 2.563 (sunlight)
Loudspeaker Voice 70dB / Noise 65dB / Ring 75dB
Audio quality Noise -93.1dB / Crosstalk -93.2dB
Battery (old) Endurance rating 76h
Colors Glossy cyan, Orange, White, Matte black
Price About 150 EUR
PhoneInsight Benchmark
19.9/100
Basic

A specs-derived composite score, not a lab benchmark -- useful for ranking and comparison.

Processor 8.6
Display 54.7
Camera 41.5
Battery 42.5
905,032 hitsTotal views
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