| Local Name | N81 |
| Technology | GSM / UMTS |
| 3G Bands | UMTS 2100 |
| 2G Bands | GSM 850 / 900 / 1800 / 1900 |
| Speed | Yes, 384 kbps |
| GPRS | Class 10 |
| EDGE | Yes |
| Announced | 2007, August. Released 2007, November |
| Status | Discontinued |
| Dimensions | 102 x 50 x 17.9 mm, 86 cc (4.02 x 1.97 x 0.70 in) |
| Weight | 140 g (4.94 oz) |
| SIM | Mini-SIM |
| Display Type | TFT, 16M colors |
| Screen Size | 2.4 inches (~35.0% screen-to-body ratio) |
| Resolution | 240 x 320 pixels (~167 ppi pixel density) | Touch-sensitive Navi wheel |
| OS | Symbian OS 9.2, Series 60 v3.1 UI |
| CPU | 369 MHz ARM 11 |
| Card Slot | microSD, up to 8 GB, 2 GB included |
| Internal Memory | 12 MB, 96 MB RAM |
| Primary Camera | 2 MP, 1600 x 1200 pixels, LED flash |
| Video | 320p@15fps |
| Secondary Camera | CIF videocall camera |
| Alert Types | Vibration; Downloadable polyphonic, monophonic, MP3 ringtones |
| Loudspeaker | Yes |
| 3.5mm Jack | Yes |
| WLAN | Wi-Fi 802.11b/g with UPnP |
| Bluetooth | v2.0, A2DP |
| GPS | No |
| Radio | Stereo FM radio; Visual radio |
| USB | microUSB v2.0 |
| Messaging | SMS, MMS, Email, Instant Messaging |
| Browser | WAP 2.0/xHTML, HTML |
| Java | Yes, MIDP 2.0 |
| Features Summary | MP3/AAC/MP4 player, Predictive text input, Push to talk, Voice dial/memo, Organizer |
| Battery | Li-Po 1050 mAh battery (BT-6MT) |
| Stand By | Up to 410 h |
| Talk Time | Up to 4 h (2G) / 3 h (3G) |
| Colors | Cobalt blue, Graphite grey |
| SAR US | 0.73 W/kg (head) 0.60 W/kg (body) |
| SAR EU | 0.81 W/kg (head) |
