Microsoft Lumia 640 Dual SIM Full Specs Prices & Insights

Design and Build

The Microsoft Lumia 640 Dual SIM features a sleek and modern design with dimensions of 141.3 x 72.2 x 8.8 mm, allowing for a comfortable grip. Weighing 145 grams, it strikes a balance between sturdiness and portability. The device comes with a plastic build that feels solid and reliable. Available in Glossy cyan, Orange, White, and Matte black, it offers options to suit various style preferences. The Lumia 640 Dual SIM incorporates a Corning Gorilla Glass 3 protection, safeguarding the screen against scratches and minor impacts.

Display

Equipped with a 5.0-inch IPS LCD screen, the Microsoft Lumia 640 Dual SIM provides a resolution of 720 x 1280 pixels. This translates to a pixel density of approximately 294 pixels per inch, ensuring sharp and clear visuals. The display achieves a screen-to-body ratio of about 67.6%, offering an immersive viewing experience. The contrast ratio of 1034:1 nominal and a sunlight contrast ratio of 2.563 enhance the clarity of the screen under various lighting conditions.

Performance

Under the hood, the Lumia 640 Dual SIM is powered by a Qualcomm MSM8926 Snapdragon 400 chipset, featuring a quad-core 1.2 GHz Cortex-A7 CPU and an Adreno 305 GPU. It runs on Microsoft Windows Phone 8.1, which is upgradable to Microsoft Windows 10, ensuring access to the latest features and updates. Although it comes with 1GB of RAM, the device handles daily tasks smoothly and efficiently for an optimal user experience.

Camera

The device comes equipped with an 8-megapixel main camera with an f/2.2 aperture and autofocus, ensuring capture of detailed and vibrant photos. The camera's LED flash assists in low-light conditions, while the video recording capability supports 1080p resolution at 30 frames per second. For selfies and video calls, the Lumia 640 Dual SIM features a 1-megapixel front-facing camera, capable of recording 720p videos.

Battery Life

Powering the Lumia 640 Dual SIM is a removable Li-Ion 2500 mAh battery. The device boasts a standby time of up to 840 hours on both 2G and 3G networks. It offers a talk time of up to 27 hours and 30 minutes on 2G and up to 20 hours and 30 minutes on 3G, highlighting its endurance for lengthy conversations. The battery's endurance rating stands at 76 hours, making it highly reliable for prolonged usage over the day.

Connectivity and SIM Options

Supporting dual Micro-SIM capabilities with dual standby, the Lumia 640 Dual SIM caters to users requiring two separate phone lines. Network technology includes GSM and HSPA, ensuring solid connectivity speeds with HSPA 42.2/5.76 Mbps. Furthermore, it is equipped with Wi-Fi 802.11 b/g/n, DLNA, and hotspot functionality, alongside Bluetooth 4.0, GPS with A-GPS, GLONASS, BDS, and FM radio support.

Storage and Expandability

The device includes 8GB of internal storage, which can accommodate essential apps, photos, and data. For users requiring additional space, the Lumia 640 Dual SIM supports microSDXC in a dedicated slot, allowing for significant storage expansion to suit individual needs.

Audio and Multimedia

Featuring a built-in loudspeaker and a 3.5mm headphone jack, the Lumia 640 Dual SIM provides quality audio output. Its audio quality is detailed, with noise levels measured at -93.1dB and crosstalk at -93.2dB, ensuring an enjoyable multimedia experience across various audio formats.

Sensors and Additional Features

The device includes standard sensors such as an accelerometer, proximity sensor, and a compass, enhancing its usefulness in navigation and other applications. Although it lacks NFC support, it compensates by covering essential connectivity and operational requirements, maintaining Microsoft’s reputation for functional and efficient smartphone design.

Conclusion

Overall, the Microsoft Lumia 640 Dual SIM is a well-rounded smartphone that delivers essential features and efficient performance. Its dual-SIM functionality, reliable battery life, and upgradeable operating system contribute to its appeal. While it might not compete with flagship devices in terms of specifications, it provides a solid experience, especially for users seeking practicality and durability without breaking the bank.