| Local Name | Lumia 640 Dual SIM |
| Technology | GSM / HSPA |
| 3G Bands | HSDPA 850 / 900 / 1900 / 2100 |
| 2G Bands | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 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) |
| Display Type | Li-Ion 2500 mAh, removable |
| Screen 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 | ClearBlack display |
| 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 Memory | 8GB 1GB RAM | eMMC 4.5 |
| Camera 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 |
| 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 |
