Compare phones
Microsoft Lumia 640
LTE Dual SIMRM-1109
| Global Score | |
| 64.3 | 71.8 |
| Basic Information | |
| Microsoft | Xiaomi |
| Windows Phone 8.1 | Android 6.0 Marshmallow |
| 0000-00-00 | 2017-02-14 |
| 5.56 x 2.84 x 0.35 inches | 5.94 x 2.99 x 0.33 inches |
| 5.11 ounces | 5.82 ounces |
| Black, Blue, Orange and White | 16 777 216 |
| -- | Metal |
| Scratch-Resistant Glass | -- |
| $ 139.00 | $ 145.00 |
| Display / Screen | |
| 5 inches | 5.5 inches |
| 720 x 1280 pixels (HD) | 1920 x 1080 pixels (Full HD) |
| IPS LCD | IPS LCD |
| 294 pixels per inch | 401 pixels per inch |
| Capacitive, Multi-touch | No touch screen |
| 8.1 | 8 |
| Performance | |
| Qualcomm Snapdragon 400 chipset | Qualcomm Snapdragon 625 8953 chipset |
| Quad-Core 1200 MHz processor | ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 2000 MHz) processor |
| 1 GB RAM | 3 GB RAM |
| Yes GPU | Adreno 506 GPU |
| 8.1 | 9.09 |
| Storage | |
| 8 GB internal memory | 32 GB internal memory |
| microSD, microSDHC, microSDXC (up to 128 GB) external memory slot | microSDXC (up to 128 GB) external memory slot |
| 5.62 | 8.12 |
| Camera | |
| 8.00 MP + 0.90 MP | 13.00 MP + 5.00 MP |
| f/2.20 aperture | f/2.00 aperture |
| 28.00mm focal length | -- |
| 0.25 inches (1/4") sensor | -- |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| -- | 1280 x 720 (120 fps) (HD) slow motion video |
| 8.25 | 9.02 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE (4G), HSPA+ (4G), HSDPA, HSUPA, EDGE, GPRS and GSM | LTE-A (4G), LTE (4G) and HSPA |
| Micro SIM, Dual SIM | Micro SIM |
| 7 | 6.1 |
| Battery Life | |
| 2500mAh Battery | 4100mAh Li - Polymer Battery |
| Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 864 hours standby time 26.5 hours talk time | -- |
| 4.48 | 6 |
| Other Features | |
| Bluetooth 4.0 | Bluetooth 4.2 |
| GPS | GPS |
| NFC | -- |
| -- | Infra-red port |
| -- | Fingerprint ID Scanner |
| Accelerometer, Compass, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | -- |
Comparison review
Xiaomi Redmi Note 4X has a general score of 71.8, which is much better than the Lumia 640's general score of 64.3. The Xiaomi Redmi Note 4X counts with Android 6.0 Marshmallow operating system, while Lumia 640 works with Windows Phone 8.1 operating system. Xiaomi Redmi Note 4X is a a little thinner but heavier phone than the Lumia 640.
The Xiaomi Redmi Note 4X features a quite better hardware performance than Microsoft Lumia 640, because it has a higher amount of RAM and more cores. Lumia 640 has a little more vivid screen than Xiaomi Redmi Note 4X, although it has a bit smaller screen, a much worse count of pixels in each inch of display and a lot worse 1280 x 720 resolution.
Xiaomi Redmi Note 4X features a much bigger memory for apps and games than Lumia 640, and although they both have an external SD slot that admits a maximum of 128 GB, the Xiaomi Redmi Note 4X also has more internal storage. Xiaomi Redmi Note 4X has a way better battery performance than Microsoft Lumia 640, because it has a 4100mAh battery size.
The Xiaomi Redmi Note 4X takes clearer photographs and videos than Lumia 640, and although they both have the same 30 frames per second video frame rate and the same (Full HD) video quality, the Xiaomi Redmi Note 4X also has a larger aperture to capture better photography and video in low-light situations and a back facing camera with a much better resolution.
The Xiaomi Redmi Note 4X is a bit more expensive than the Lumia 640, but it's still a great choice, as you can get a much better phone for that extra money.
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