The Microsoft Lumia 640 XL LTE Dual SIM was a mid-range Windows 10 smartphone that featured a 5.7-inch HD display, a Qualcomm Snapdragon 400 processor, 1GB of RAM, and 8GB of storage. It also had an 8MP rear camera, a 1MP front camera, and a removable 3000mAh battery.
Frequently Asked Questions(FAQs)
How to reset or factory restore Microsoft Lumia 640 XL LTE Dual SIM device?
The most common ways to reset or factory restore a Microsoft Lumia 640 XL LTE Dual SIM device are:
1. Hard Reset: This involves using the power button, volume up button, and the home button simultaneously to reset the device to its factory settings. To perform a hard reset on a Lumia 640 XL LTE Dual SIM:
- Turn off the device by pressing and holding the power button.
- Press and hold the power button, the volume up button, and the home button simultaneously.
- Release the buttons after about 30 seconds and wait for the device to restart.
2. Soft Reset: This involves using the power button and the home button simultaneously to reset the device to its factory settings. To perform a soft reset on a Lumia 640 XL LTE Dual SIM:
- Press and hold the power button and the home button simultaneously.
- Release both buttons after about 10 seconds and wait for the device to restart.
3. Factory Reset Using USB Cable: This involves connecting the device to a computer using a USB cable and then using the Nokia PC settings app to perform a factory reset. To perform a factory reset using a USB cable on a Lumia 640 XL LTE Dual SIM:
- Connect the device to the computer using a USB cable.
- Make sure the Nokia PC settings app is installed on the computer.
- Open the Nokia PC settings app and select device settings.
- Select more settings and then select factory reset all.
- Follow the onscreen instructions to confirm the factory reset.
It is recommended to use the factory reset option only if absolutely necessary, such as if the device is severely compromised or experiencing software issues that do not respond to other troubleshooting methods.
What is the battery capacity of Microsoft Lumia 640 XL LTE Dual SIM?
3000 mAh
What is the display size of Microsoft Lumia 640 XL LTE Dual SIM?
5.7 inches
What is the RAM size of Microsoft Lumia 640 XL LTE Dual SIM?
1 GB
Specifications
Network
| Technology | GSM / HSPA / LTE |
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| 2G bands | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
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| 3G bands | HSDPA 850 / 900 / 1700 / 1900 / 2100 |
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| 4G bands | 1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 28, 38, 40 |
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| Speed | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps |
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Launch
| Announced | 2015, March. Released 2015, April |
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| Status | Discontinued |
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Body
| Dimensions | 157.9 x 81.5 x 9 mm (6.22 x 3.21 x 0.35 in) |
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| Weight | 171 g (6.03 oz) |
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| SIM | Dual SIM (Micro-SIM, dual stand-by) |
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Display
| Type | IPS LCD |
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| Size | 5.7 inches, 88.9 cm2 (~69.1% screen-to-body ratio) |
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| Resolution | 720 x 1280 pixels, 16:9 ratio (~259 ppi density) |
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| Protection | Corning Gorilla Glass 3 |
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| ClearBlack display |
Platform
| OS | Microsoft Windows Phone 8.1, upgradable to Microsoft Windows 10 |
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| Chipset | Qualcomm MSM8226 Snapdragon 400 (28 nm) |
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| CPU | Quad-core 1.2 GHz Cortex-A7 |
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| GPU | Adreno 305 |
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Memory
| Card slot | microSDXC (dedicated slot) |
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| Internal | 8GB 1GB RAM |
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| eMMC 4.5 |
Main Camera
| Single | 13 MP, f/2.0, 28mm (wide), 1/3", AF |
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| Features | Zeiss optics, LED flash |
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| Video | 1080p@30fps |
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Selfie camera
| Single | 5 MP |
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| Video | 1080p@30fps |
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Sound
| Loudspeaker | Yes |
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| 3.5mm jack | Yes |
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Comms
| WLAN | Wi-Fi 802.11 b/g/n, DLNA, hotspot |
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| Bluetooth | 4.0, A2DP |
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| Positioning | GPS, GLONASS, BDS |
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| NFC | Yes |
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| Radio | FM radio |
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| USB | microUSB 2.0 |
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Features
| Sensors | Accelerometer, proximity, compass, sensor core |
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Battery
| Type | Li-Ion 3000 mAh, removable |
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| Stand-by | Up to 936 h (2G) / Up to 936 h (3G) |
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| Talk time | Up to 31 h 20 min (2G) / Up to 23 h 40 min (3G) |
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Misc
| Colors | Matte cyan, Orange, Black, Matte white, Glossy white |
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| Price | About 200 EUR |
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Tests
| Display | Contrast ratio: 1119:1 (nominal), 3.065 (sunlight) |
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| Loudspeaker | Voice 72dB / Noise 67dB / Ring 73dB |
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| Audio quality | Noise -93.0dB / Crosstalk -94.4dB |
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| Battery life | Endurance rating 74h |
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