Sources and limitations

Listed specifications are reference information, not results of TechMyte testing. Rumored details may change, and hardware or supported features can differ by region. Confirm the exact model with its manufacturer before buying.

Battery capacity does not establish tested endurance; megapixel count does not establish camera quality. Use the comparison tool to identify differences, then check the features that matter to your use.

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Technical data sheet

Full Specifications

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

Launch

Announced	2015, March. Released 2015, April
Status	Discontinued

Body

Dimensions	157.9 x 81.5 x 9 mm (6.22 x 3.21 x 0.35 in)
Weight	171 g (6.03 oz)
SIM	Dual SIM (Micro-SIM, dual stand-by)

Battery

Type	IPS LCD
Talk time	Up to 31 h 20 min (2G) / Up to 23 h 40 min (3G)
Stand-by	Up to 936 h (2G) / Up to 936 h (3G)

Display

Size	5.7 inches, 88.9 cm2 (~69.1% screen-to-body ratio)
Resolution	720 x 1280 pixels, 16:9 ratio (~259 ppi density)
Protection	Corning Gorilla Glass 3

Platform

OS	Microsoft Windows Phone 8.1, upgradable to Microsoft Windows 10
Chipset	Qualcomm MSM8226 Snapdragon 400 (28 nm)
CPU	Quad-core 1.2 GHz Cortex-A7
GPU	Adreno 305

Memory

Card slot	microSDXC (dedicated slot)
Internal	8GB 1GB RAM

Selfie camera

Single	13 MP, f/2.0, 28mm (wide), 1/3.0", AF
Video	1080p@30fps

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

Features

Sensors	Accelerometer, proximity, compass, sensor core

Misc

Colors	Matte cyan, Orange, Black, Matte white, Glossy white
Price	About 200 EUR

Main Camera

Features	Zeiss optics, LED flash

Tests

Display	Contrast ratio: 1119:1 (nominal), 3.065 (sunlight)
Loudspeaker	Voice 72dB / Noise 67dB / Ring 73dB
Audio quality	Noise -93.0dB / Crosstalk -94.4dB
Battery (old)	Endurance rating 74h

Microsoft Lumia 640 XL LTE Dual SIM