| Local Name | X400 |
| Technology | GSM |
| 2G Bands | GSM 900 / 1800 / 1900 |
| GPRS | Class 8 |
| EDGE | No |
| Announced | 2003, 2Q |
| Status | Discontinued |
| Dimensions | 86 x 46 x 20 mm (3.39 x 1.81 x 0.79 in) |
| Weight | 90 g (3.17 oz) |
| SIM | Mini-SIM |
| Display Type | TFT, 65K colors |
| Resolution | 128 x 160 pixels, 7 lines | Second external monochrome display (96 x 64 pixels) - Two four way navigation keys |
| Card Slot | No |
| Phone Book | 500 x 6 fields, contact groups |
| Call Records | 10 dialed, 10 received, 10 missed calls | 50 short messages - Message templates |
| Alert Types | Vibration; Downloadable polyphonic ringtones |
| Loudspeaker | No |
| 3.5mm Jack | No |
| WLAN | No |
| Bluetooth | No |
| GPS | No |
| Infrared Port | Yes |
| Radio | FM radio |
| Messaging | SMS, EMS |
| Browser | WAP 1.2.1 |
| Clock | Yes |
| Alarm | Yes |
| Games | 4 - BubbleSmile, Fun2Link, Golf, MobileChess + Java |
| Java | Yes |
| Features Summary | Predictive text input, Organizer, Speed dial, Menu shortcuts, World clock |
| Battery | Li-Ion 620 mAh battery |
| Stand By | Up to 380 h |
| Talk Time | Up to 5 h |
| Colors | 4 -Deep Blue, Yellow Green, Dark Violet, Caramel Orange |
| SAR EU | 0.60 W/kg (head) |