| Local Name | Optimus Chat C550 |
| Technology | GSM / HSPA |
| 3G Bands | HSDPA 900 / 1700 / 2100 |
| 2G Bands | GSM 850 / 900 / 1800 / 1900 |
| Speed | HSPA 7.2/5.76 Mbps |
| GPRS | Yes |
| EDGE | Yes |
| Announced | 2011, February |
| Status | Available. Released 2011, March |
| Dimensions | 109 x 59 x 16 mm (4.29 x 2.32 x 0.63 in) |
| Weight | 122 g (4.30 oz) |
| Keyboard | QWERTY |
| SIM | Mini-SIM |
| Display Type | TFT touchscreen, 256K colors |
| Screen Size | 2.8 inches (~36.3% screen-to-body ratio) |
| Resolution | 320 x 480 pixels (~206 ppi pixel density) |
| OS | Android OS, v2.2 (Froyo) |
| Card Slot | microSD, up to 32 GB |
| Internal Memory | 140 MB |
| Primary Camera | 3.15 MP, 2048 x 1536 pixels, autofocus |
| Camera Features | Geo-tagging |
| Video | Yes |
| Secondary Camera | No |
| Alert Types | Vibration; MP3, WAV ringtones |
| Loudspeaker | Yes |
| 3.5mm Jack | Yes |
| WLAN | Wi-Fi 802.11 b/g, Wi-Fi Direct, hotspot |
| Bluetooth | v2.1, A2DP, EDR |
| GPS | Yes, with A-GPS |
| Radio | FM radio |
| USB | microUSB v2.0 |
| Sensors | Accelerometer |
| Messaging | SMS (threaded view), MMS, Email, Push Email, IM |
| Browser | HTML |
| Java | Yes, via Java MIDP emulator |
| Features Summary | MP4/H.264/WMV player, MP3/WAV/WMA/eAAC+ player, Document viewer, Organizer, Voice memo, Predictive text input |
| Battery | Li-Ion 1500 mAh battery |
| Stand By | Up to 440 h |
| Talk Time | Up to 5 h |
| Colors | Black, silver, blue, red, pink |
| SAR US | 0.49 W/kg (head) 0.39 W/kg (body) |
| SAR EU | 0.71 W/kg (head) 1.24 W/kg (body) |
