| 2G Network | GSM 900 / 1800 / 1900 - Z550i |
| | GSM 850 / 1800 / 1900 - Z550a |
| Announced | 2006, May |
| Status | Discontinued |
| Dimensions | 87.5 x 45.4 x 20 mm |
| Weight | 93 g |
| Type | TFT, 256K colors |
| Size | 176 x 220 pixels, 1.9 inches, 30 x 37 mm (~148 ppi pixel density) |
| | - Second external STN, mono display (128 x 36 pixels)
- Wallpapers, screensavers |
| Alert types | Vibration; Downloadable polyphonic, MP3, AAC ringtones, composer |
| Loudspeaker | Yes |
| 3.5mm jack | No |
| Card slot | Memory Stick Micro (M2), up to 2GB |
| Phonebook | 1000 entries, Photocall |
| Call records | 30 received, dialed and missed calls |
| Internal | 25 MB |
| GPRS | Class 10 (4+1/3+2 slots), 32 - 48 kbps |
| EDGE | No |
| Speed | No |
| WLAN | No |
| Bluetooth | Yes |
| USB | Yes |
| Primary | 1.3 MP, 1280 x 1024 pixels |
| Video | Yes, QCIF |
| Secondary | No |
| Messaging | SMS, MMS, Email |
| Browser | WAP 2.0/HTML (NetFront), RSS reader |
| Radio | Stereo FM radio with RDS |
| Games | Yes + downloadable |
| GPS | No |
| Java | Yes, MIDP 2.0 |
| Colors | Sterling Black, Pearl Copper |
| | - Push to talk
- Media player (MP3, 3GP, AAC, MP4)
- Predictive text input
- Picture editor
- Organizer
- Voice memo |
| | Standard battery, Li-Ion 750 mAh |
| Stand-by | Up to 320 h |
| Talk time | Up to 5 h |
| SAR EU | 1.24 W/kg (head) |
| Price group | |
