| Hardware and OS Microsoft Lumia 640 Dual SIM |
| Operating system: | Microsoft Windows Phone 8.1, upgradable to Microsoft Windows 10 |
| Processor: | Quad-core 1.2 GHz Cortex-A7 |
| Chipset: | Qualcomm MSM8926 Snapdragon 400 (28 nm) |
| GPU: | Adreno 305 |
| Internal memory: | 8 GB, 1 GB RAM |
| External memory: | microSD, up to 256 GB (dedicated slot) |
| Display Microsoft Lumia 640 Dual SIM |
| Type: | IPS LCD |
| Size: | 5" inc |
| Resolution: | 720 x 1280 px |
| Protection: | Corning Gorilla Glass 3 |
| Touchscreen: | capacitive touchscreen |
| Screen-to-Body Ratio: | 67.6% |
| Display area: | 68.9 cm2 |
| Display aspect ratio: | 16:9 (height:width) |
| Pixel Density: | 294 PPI |
| Colors: | 16M |
| Other: | ClearBlack display |
| Connectivity Microsoft Lumia 640 Dual SIM |
| 2G Network: | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| Wi-Fi: | Wi-Fi 802.11 b/g/n, DLNA, hotspot |
| Network: | GSM / HSPA |
| SIM card: | Dual SIM (Micro-SIM, dual stand-by) |
| Bluetooth: | 4.0, A2DP |
| Edge: | Yes |
| GPRS: | Yes |
| GPS: | Yes, with A-GPS, GLONASS, BDS |
| Speed: | HSPA 42.2/5.76 Mbps |
| USB: | microUSB 2.0 |
| Camera Microsoft Lumia 640 Dual SIM |
| Main camera: | 8 MP,
Single |
| Specs: | 8 MP, f/2.2, 28mm (wide), 1/4', AF |
| Features: | LED flash |
| Video: | 1080p@30fps |
| Selfie camera: | 1 MP,
Single |
| Specs: | 1 MP |
| Video: | 720p |
| Multimedia Microsoft Lumia 640 Dual SIM |
| 3.5 mm Jack: | Yes |
| Radio: | FM radio |
| Design Microsoft Lumia 640 Dual SIM |
| Colors: | Glossy cyan, Orange, White, Matte black |
| Dimensions: | 141.3 x 72.2 x 8.8 mm |
| Weight: | 145 g |
| Battery Microsoft Lumia 640 Dual SIM |
| Battery capacity: | 2500 mAh, Removable Li-Ion |
| Battery life: | Stand by time- Up to 840 h (2G) / Up to 840 h (3G)
Talking time- Up to 27 h 30 min (2G) / Up to 20 h 30 min (3G)
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| Other Microsoft Lumia 640 Dual SIM |
| Release date: | 2015, March |
| Sensors: | Accelerometer, proximity, compass |
