Microsoft Lumia 640 Dual SIM
Release Date
Released 2015, April
OS Version
Microsoft Windows Phone 8.1
Body
145g, 8.8mm thickness
RAM
1 GB RAM
Storage
8GB storage, microSDXC
Battery
2500 mAh
Display
Size
5.0"
Resolution
720x1280 pixels
Technology
IPS LCD
Camera
Main Camera
Video Recording
Front Camera
16MP
Hardware
Chipset
Snapdragon 400
GPU
Adreno 660
Storage Options
8GB storage, microSDXC
| Technology | GSM / HSPA |
| 2G bands | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G bands | HSDPA 850 / 900 / 1900 / 2100 |
| Speed | HSPA 42.2/5.76 Mbps |
| Announced | 2015, March. Released 2015, April |
| Status | Discontinued |
| 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 |
| Size | 5.0 inches, 68.9 cm2 (~67.6% screen-to-body ratio) |
| Resolution | 720 x 1280 pixels, 16:9 ratio (~294 ppi density) |
| Protection | Corning Gorilla Glass 3 |
| | eMMC 4.5 |
| 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 |
| Card slot | microSDXC (dedicated slot) |
| Internal | 8GB 1GB RAM |
| Single | 1 MP |
| Features | LED flash |
| Video | 720p |
| Loudspeaker | Yes |
| 3.5mm jack | Yes |
| WLAN | Wi-Fi 802.11 b/g/n, DLNA, hotspot |
| Bluetooth | 4.0, A2DP |
| GPS | Yes, with A-GPS, GLONASS, BDS |
| NFC | No |
| Radio | FM radio |
| USB | microUSB 2.0 |
| Sensors | Accelerometer, proximity, compass |
| Stand-by | Up to 840 h (2G) / Up to 840 h (3G) |
| Talk time | Up to 27 h 30 min (2G) / Up to 20 h 30 min (3G) |
| Colors | Glossy cyan, Orange, White, Matte black |
| Price | About 170 EUR |
| Display | Contrast ratio: 1034 (nominal), 2.563 (sunlight) |
| Loudspeaker | Voice 70dB / Noise 65dB / Ring 75dB |
| Audio quality | Noise -93.1dB / Crosstalk -93.2dB |
| Battery life | Endurance rating 76h |