Compare phones
| Global Score | |
| 60.8 | 66.3 |
| Basic Information | |
| Microsoft | Xiaomi |
| Windows 10 Mobile | Android 5.0 |
| 2015-10-06 | 2015-04-23 |
| 5.36 x 2.67 x 0.39 inches | 5.44 x 2.74 x 0.31 inches |
| 5.01 ounces | 4.59 ounces |
| Black and White | Black, Blue, Pink, White and Yellow |
| Plastic | Plastic |
| -- | Scratch-Resistant Glass |
| $ 185.00 | $ 155.00 |
| Display / Screen | |
| 4.7 inches | 5 inches |
| 720 x 1280 pixels (HD) | 1080 x 1920 pixels (Full HD) |
| LCD | IPS LCD |
| 312 pixels per inch | 441 pixels per inch |
| Capacitive, Multi-touch | Capacitive, Multi-touch |
| 8.2 | 9 |
| Performance | |
| Qualcomm Snapdragon 210 8909 chipset | Qualcomm Snapdragon 615 8939 chipset |
| ARM Cortex-A7 (Single-Core 1100 MHz) processor | ARM Cortex-A53, 64-bit (Single-Core 1700 MHz) processor |
| 1 GB RAM | 2 GB (800 MHz) RAM |
| Adreno 304 GPU | Adreno 405 GPU |
| 7.56 | 8.1 |
| Storage | |
| 8 GB internal memory | 32 GB internal memory |
| microSD, microSDHC, microSDXC (up to 200 GB) external memory slot | No SD card slot |
| 6.06 | 5.8 |
| Camera | |
| 5.00 MP + 2.00 MP | 13.00 MP + 5.00 MP |
| f/2.40 aperture | f/2.00 aperture |
| 28.00mm focal length | -- |
| 0.25 inches (1/4") sensor | -- |
| 1280 x 720 (30 fps) (HD) video resolution | -- |
| 7.7 | 7.92 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | -- |
| LTE (4G), HSPA+ (4G), HSDPA, HSUPA, EDGE, GPRS and GSM | LTE (4G) and GSM |
| Nano SIM | Micro SIM, Dual SIM |
| 7 | 4.9 |
| Battery Life | |
| 2100mAh Battery | 3120mAh Li - Polymer Battery |
| Removable Battery | Removable Battery |
| 672 hours standby time 16 hours talk time | -- |
| 4 | 5.12 |
| Other Features | |
| Bluetooth 4.1 | Bluetooth 4.1 |
| GPS | GPS |
| Accelerometer, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
Comparison review
The Xiaomi Mi 4i is a bit better than Lumia 550, getting a overall score of 66.3 against 60.8. Even when the Xiaomi Mi 4i and the Lumia 550 were released with only a couple months difference, the Xiaomi Mi 4i is just a little lighter and noticeably thinner. The Xiaomi Mi 4i comes with Android 5.0 operating system, while Lumia 550 has Windows 10 Mobile operating system.
Xiaomi Mi 4i counts with a bit faster CPU than Microsoft Lumia 550, and although they both have the same number of cores, the Xiaomi Mi 4i also has a higher amount of RAM memory. The Xiaomi Mi 4i has just a bit better screen than Lumia 550, because it has a bit bigger display, a way higher 1920 x 1080 resolution and a better amount of pixels per inch in the display.
Lumia 550 has a slightly bigger storage capacity to store more games and applications than Xiaomi Mi 4i, because although it has just 8 GB internal memory capacity, it also counts with a slot for SD memory cards that supports a maximum of 200 GB. The Xiaomi Mi 4i has a very superior battery life than Microsoft Lumia 550, because it has a 49% larger battery capacity.
The Xiaomi Mi 4i captures clearer photos and videos than Lumia 550, because it has a way higher resolution back camera and a bigger aperture.
Even being the best phone in our comparison, Xiaomi Mi 4i is also a lot cheaper, which makes buying this phone an easy decision.
Disclaimer: As an Amazon Associate I earn from qualifying purchases.