Sony Ericsson K550
| General | Form Factor | Candy bar |
| Network | GSM 850 / GSM 900 / GSM 1800 / GSM 1900 | |
| Size | 102 x 46 x 14 mm | |
| Weight | 85 g | |
| Battery Type | Li-Ion | |
| Talk Time | 7 h | |
| Standby Time | 350 h | |
| Display | Display Type | TFD (Thin Film Diode) |
| Display Size | 176 x 220 pixels | |
| Display Colors | 256 | |
| External display | No | |
| Memory | Internal Memory | 64 MB |
| Card Slot | Memory Stick Micro (M2) | |
| Camera | Type | 2 megapixel (1632 x 1224 pixels) with autofocus |
| Zoom | No | |
| Flash | Yes | |
| Video | Yes, QCIF quality | |
| Secondary Camera | No | |
| Messaging | SMS | Yes |
| MMS | Yes | |
| EMS | No | |
| IM | Yes | |
| Yes | ||
| Connectivity | GPRS | Yes |
| EDGE | Yes | |
| 3G | No | |
| Wi-Fi | No | |
| Infrared | Yes | |
| Bluetooth | Yes, 2.0 | |
| USB | Yes, 2.0 | |
| Features | OS | No |
| Browser | Yes | |
| Games | Yes | |
| Other | MP3/AAC/MPEG4 player FM radio with RDS Java MIDP 2.0 Built-in handsfree |