Compare phones
Microsoft Lumia 640
LTE Dual SIMRM-1109
| Global Score | |
| 64.3 | 68.2 |
| Basic Information | |
| Microsoft | Xiaomi |
| Windows Phone 8.1 | Android 10 |
| 0000-00-00 | 2020-07-15 |
| 5.56 x 2.84 x 0.35 inches | 6.49 x 3.03 x 0.35 inches |
| 5.11 ounces | 6.91 ounces |
| Black, Blue, Orange and White | Carbon grey, Ocean green and Sky blue |
| -- | Plastic |
| Scratch-Resistant Glass | -- |
| $ 139.00 | $ 126.00 |
| Display / Screen | |
| 5 inches | 6.5 inches |
| 720 x 1280 pixels (HD) | 1600 x 720 pixels |
| IPS LCD | IPS LCD |
| 294 pixels per inch | 270 pixels per inch |
| Capacitive, Multi-touch | No touch screen |
| 8.1 | 7.2 |
| Performance | |
| Qualcomm Snapdragon 400 chipset | MediaTek Helio G25 chipset |
| Quad-Core 1200 MHz processor | Arm Cortex-A53, 64-bit, 12 nm (Octa-Core 2000 MHz) processor |
| 1 GB RAM | 2 GB RAM |
| Yes GPU | PowerVR GE8320 GPU |
| 8.1 | 9 |
| Storage | |
| 8 GB internal memory | 32 GB internal memory |
| microSD, microSDHC, microSDXC (up to 128 GB) external memory slot | No SD card slot |
| 5.62 | 5.8 |
| Camera | |
| 8.00 MP + 0.90 MP | 13.00 MP + 5.00 MP |
| f/2.20 aperture | -- |
| 28.00mm focal length | -- |
| 0.25 inches (1/4") sensor | -- |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 1920 x 1080 (60 fps) (Full HD) video resolution |
| 8.25 | 8.14 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE (4G), HSPA+ (4G), HSDPA, HSUPA, EDGE, GPRS and GSM | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Micro SIM, Dual SIM | Nano SIM, Dual SIM |
| 7 | 6.7 |
| Battery Life | |
| 2500mAh Battery | 5000mAh Li - Polymer Battery |
| Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 864 hours standby time 26.5 hours talk time | -- |
| 4.48 | 6.8 |
| Other Features | |
| Bluetooth 4.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | -- |
| Accelerometer, Compass, Light Sensor and Proximity Sensor | Accelerometer, Light Sensor and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
Xiaomi Redmi 9A has a score of 68.2, which is slightly better than Lumia 640's global score of 64.3. The Xiaomi Redmi 9A has Android 10 OS, while Lumia 640 comes with Windows Phone 8.1 OS. The Xiaomi Redmi 9A is a a lot heavier phone than Lumia 640, but both of them are 0.35inches thick. Xiaomi Redmi 9A has a greater hardware performance than Microsoft Lumia 640, because it has 1 GB more RAM and a larger number of cores.
The Microsoft Lumia 640 counts with a more vivid screen than Xiaomi Redmi 9A, because although it has a bit lower 1280 x 720 resolution and a really smaller display, it also counts with a little more pixels per screen inch. The Xiaomi Redmi 9A features a little bit better storage for applications, games, photos and videos than Lumia 640, because although it has no SD card slot, it also counts with 24 GB more internal memory.
The Xiaomi Redmi 9A features a very superior battery lifetime than Microsoft Lumia 640, because it has 5000mAh of battery capacity. The Lumia 640 shoots clearer photos and videos than Xiaomi Redmi 9A, although it has a worse (Full HD) video resolution and a way worse 8 megapixels resolution back camera.
Xiaomi Redmi 9A is not only the best phones in our comparison, but it's also cheaper than the other phone.
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