| key specs |
| Display | 4.70-inch | 4.00-inch |
| Processor | Qualcomm Snapdragon 210 | Qualcomm Snapdragon 200 |
| Front Camera | 2-megapixel | 0.3-megapixel |
| Rear Camera | 5-megapixel | 2-megapixel |
| RAM | 1GB | 1GB |
| Storage | 8GB | 8GB |
| Battery Capacity | 2100mAh | 1560mAh |
| OS | Windows 10 Mobile | Windows Phone 8.1 |
| Resolution | 720x1280 pixels | 480x800 pixels |
| general |
| Brand | Microsoft | Microsoft |
| Model | Lumia 550 | Lumia 435 |
| Release date | October 1, 2015 | January 1, 2015 |
| Form factor | Touchscreen | Touchscreen |
| Dimensions (mm) | 136.10 x 67.80 x 9.90 | 118.10 x 64.70 x 11.70 |
| Battery capacity (mAh) | 2100 | 1560 |
| Removable battery | Yes | Yes |
| Colours | White, Black | Bright Green, Bright Orange, White, Black |
| Weight (g) | - | 134.10 |
| display |
| Screen size (inches) | 4.70 | 4.00 |
| Touchscreen | Yes | Yes |
| Resolution | 720x1280 pixels | 480x800 pixels |
| Pixels per inch (PPI) | 315 | 233 |
| hardware |
| Processor | 1.1GHz quad-core | 1.2GHz dual-core |
| Processor make | Qualcomm Snapdragon 210 | Qualcomm Snapdragon 200 |
| RAM | 1GB | 1GB |
| Internal storage | 8GB | 8GB |
| Expandable storage | Yes | Yes |
| Expandable storage type | microSD | microSD |
| Expandable storage up to (GB) | 200 | 128 |
| camera |
| Rear camera | 5-megapixel | 2-megapixel |
| Rear flash | LED | No |
| Front camera | 2-megapixel | 0.3-megapixel |
| software |
| Operating system | Windows 10 Mobile | Windows Phone 8.1 |
| connectivity |
| Wi-Fi | Yes | Yes |
| Wi-Fi standards supported | 802.11 b/g/n | - |
| GPS | Yes | Yes |
| Bluetooth | Yes, v 4.10 | Yes |
| NFC | No | No |
| Infrared | No | No |
| USB OTG | No | No |
| Headphones | 3.5mm | 3.5mm |
| FM | Yes | Yes |
| Number of SIMs | 1 | 1 |
| Wi-Fi Direct | Yes | No |
| Mobile High-Definition Link (MHL) | No | No |
| sim 1 |
| SIM Type | Nano-SIM | Micro-SIM |
| GSM/CDMA | GSM | GSM |
| 3G | Yes | Yes |
| 4G/ LTE | Yes | No |
| sensors |
| Compass/ Magnetometer | No | No |
| Proximity sensor | Yes | Yes |
| Accelerometer | Yes | Yes |
| Ambient light sensor | Yes | Yes |
| Gyroscope | No | Yes |
| Barometer | No | No |
| Temperature sensor | No | No |