| Local Name | Z400 |
| Technology | GSM / UMTS |
| 3G Bands | UMTS 2100 |
| 2G Bands | GSM 900 / 1800 / 1900 |
| Speed | Yes, 384 kbps |
| GPRS | Class 10 |
| EDGE | Yes |
| Announced | 2006, March |
| Status | Discontinued |
| Dimensions | 96.7 x 47.8 x 19.2 mm (3.81 x 1.88 x 0.76 in) |
| Weight | 107 g (3.77 oz) |
| SIM | Mini-SIM |
| Display Type | TFT, 256K colors |
| Screen Size | 2.0 inches, 30 x 40 mm (~26.8% screen-to-body ratio) |
| Resolution | 240 x 320 pixels (~200 ppi pixel density) |
| Card Slot | microSD |
| Phone Book | Yes |
| Call Records | 20 dialed, 20 received, 20 missed calls |
| Internal Memory | 30 MB |
| Primary Camera | 2 MP, 1600 x 1200 pixels |
| Video | Yes |
| Secondary Camera | VGA videocall camera |
| Alert Types | Vibration, MP3 ringtones |
| Loudspeaker | Yes |
| 3.5mm Jack | No |
| WLAN | No |
| Bluetooth | v1.2, A2DP |
| GPS | No |
| Radio | No |
| USB | Yes |
| Messaging | SMS, EMS, MMS, Email |
| Browser | WAP 2.0/xHTML |
| Games | Yes + downloadable |
| Java | No |
| Features Summary | Video telephony & streaming, MP3/AAC/ACC+ player, Predictive text input, Document viewer (Word, Excel, PowerPoint, PDF), Organizer |
| Stand By | Up to 400 h |
| Talk Time | Up to 5 h |
| Colors | Silver, Black |
| SAR US | 1.36 W/kg (head) 0.94 W/kg (body) |