| Local Name | OT 535 |
| Technology | GSM |
| 2G Bands | GSM 900 / 1800 |
| GPRS | Class 10 |
| EDGE | No |
| Announced | 2003, July |
| Status | Discontinued |
| Dimensions | 106 x 47 x 20 mm (4.17 x 1.85 x 0.79 in) |
| Weight | 88 g (3.10 oz) |
| SIM | Mini-SIM |
| Display Type | CSTN, 4096 colors |
| Resolution | 128 x 128 pixels, 7 lines | Zoom function - Landscape mode - Joystick |
| Card Slot | No |
| Phone Book | 800 x 10 fields |
| Call Records | 10 dialed, 10 received, 10 missed calls |
| Internal Memory | 1 MB | SMS templates - Supported formats: JPG, GIF, PNG, BMP, MIDI, i-Melody, AMR |
| Alert Types | Vibration; Polyphonic(24) ringtones, composer |
| Loudspeaker | No |
| 3.5mm Jack | No |
| WLAN | No |
| Bluetooth | No |
| GPS | No |
| Infrared Port | Yes |
| Radio | No |
| Messaging | SMS, EMS 4.0, MMS |
| Browser | WAP 2.0/xHTML |
| Clock | Yes |
| Alarm | Yes |
| Games | 2 - Wall Breaker , Mutant Alert + Downloadable |
| Java | No |
| Features Summary | Voice dial, Voice memo, Predictive text input, Organizer |
| Battery | Li-Ion battery |
| Stand By | Up to 260 h |
| Talk Time | Up to 6 h |
| Colors | 3 - red, blue and grey |