| Local Name | N91 |
| Technology | GSM / UMTS |
| 3G Bands | UMTS 2100 |
| 2G Bands | GSM 900 / 1800 / 1900 |
| Speed | Yes, 384 kbps |
| GPRS | Class 10 |
| EDGE | Class 10 |
| Announced | 2Q, 2005 |
| Status | Discontinued |
| Dimensions | 113.1 x 55.2 x 22 mm (4.45 x 2.17 x 0.87 in) |
| Weight | 164 g (5.78 oz) |
| SIM | Mini-SIM |
| Display Type | TFT, 256K colors |
| Screen Size | 2.1 inches, 35 x 41 mm (~22.5% screen-to-body ratio) |
| Resolution | 176 x 208 pixels (~130 ppi pixel density) | 5-way configurable navigation key |
| OS | Symbian OS v9.1, Series 60 UI 3rd Edition |
| CPU | 220 MHz Dual ARM 9 |
| Card Slot | No |
| Internal Memory | 4/8 GB, 64 MB RAM |
| Primary Camera | 2 MP, 1600 x 1200 pixels |
| Video | Yes |
| Secondary Camera | No |
| Alert Types | Vibration; Downloadable polyphonic, MP3 ringtones |
| Loudspeaker | Yes |
| 3.5mm Jack | Yes |
| WLAN | Wi-Fi 802.11b/g |
| Bluetooth | v1.2 (A2DP - 8 GB version only) |
| GPS | No |
| Radio | Stereo FM radio; Visual radio |
| USB | miniUSB v2.0 |
| Messaging | SMS, MMS, EMail, Instant Messaging |
| Browser | WAP 2.0/xHTML, HTML |
| Java | Yes, MIDP 2.0 |
| Features Summary | Predictive text input, Voice dial, Voice memo, Organizer |
| Battery | Li-Ion 900 mAh battery (BL-5C) |
| Stand By | Up to 190 h (2G) / 170 h (3G) |
| Talk Time | Up to 4 h (2G) / 3 h (3G) |
| Music Play | Up to 10 h |
| Colors | Light Blue Chrome, Dark Gray Chrome, Black (Music Edition) |
| SAR US | 0.74 W/kg (head) 0.58 W/kg (body) |
| SAR EU | 0.48 W/kg (head) |
