Compare phones
| Global Score | |
| 65.6 | 71.8 |
| Basic Information | |
| Microsoft | Xiaomi |
| Windows Phone 8.1 | Android 6.0 Marshmallow |
| 0000-00-00 | 2017-02-14 |
| 6.22 x 3.21 x 0.35 inches | 5.94 x 2.99 x 0.33 inches |
| 6.03 ounces | 5.82 ounces |
| Black, Blue, Orange and White | 16 777 216 |
| -- | Metal |
| Scratch-Resistant Glass | -- |
| $ 140.00 | $ 145.00 |
| Display / Screen | |
| 5.7 inches | 5.5 inches |
| 720 x 1280 pixels (HD) | 1920 x 1080 pixels (Full HD) |
| IPS LCD | IPS LCD |
| 258 pixels per inch | 401 pixels per inch |
| Capacitive, Multi-touch | No touch screen |
| 7.9 | 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 |
| Adreno 305 (450 MHz) GPU | Adreno 506 GPU |
| 8.37 | 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 | |
| 13.00 MP + 5.00 MP | 13.00 MP + 5.00 MP |
| f/2.00 aperture | f/2.00 aperture |
| 28.00mm focal length | -- |
| 0.33 inches (1/3") 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 |
| 9.02 | 9.02 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE (4G), HSPA+ (4G), HSDPA, HSUPA, UMTS, EDGE, GPRS and GSM | LTE-A (4G), LTE (4G) and HSPA |
| Micro SIM | Micro SIM |
| 7 | 6.1 |
| Battery Life | |
| 3000mAh Battery | 4100mAh Li - Polymer Battery |
| Removable Battery | Non-Removable Battery |
| 888 hours standby time 30.3 hours talk time | -- |
| 4.96 | 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 |
Comparison review
Xiaomi Redmi Note 4X has a general score of 71.8, which is a little bit better than Lumia 640 XL's score of 65.6. Xiaomi Redmi Note 4X's construction is a bit lighter and just a little bit thinner than the Lumia 640 XL. Xiaomi Redmi Note 4X has Android 6.0 Marshmallow OS, and Lumia 640 XL works with Windows Phone 8.1 OS.
The Xiaomi Redmi Note 4X counts with just a bit better hardware performance than Lumia 640 XL, because although it has doesn't have an additional graphics processing unit, it also counts with 4 more cores and a larger amount of RAM memory. The Xiaomi Redmi Note 4X has a little bit better display than Lumia 640 XL, because although it has a bit smaller display, it also counts with a way better pixel density and a lot better 1080 x 1920px resolution.
Xiaomi Redmi Note 4X's camera is very similar to the camera in Lumia 640 XL, both of them have the same aperture, the same (Full HD) video quality, a same resolution back-facing camera and the same video frame rates. Xiaomi Redmi Note 4X has a lot bigger memory capacity to install games and applications than Microsoft Lumia 640 XL, and although they both have an external memory slot that admits a maximum of 128 GB, the Xiaomi Redmi Note 4X also has 24 GB more internal memory.
The Xiaomi Redmi Note 4X features a much longer battery performance than Lumia 640 XL, because it has a 4100mAh battery capacity against 3000mAh.
Xiaomi Redmi Note 4X costs a bit more money than Lumia 640 XL, but you can get a better phone for that few extra dollars.
Disclaimer: As an Amazon Associate I earn from qualifying purchases.