| General | |
| Manufacturer: | Nokia |
| Model: | N91 |
| Year: | 2006 |
| Operating system: | Symbian 9.1 |
| Capacity battery (MAh): | 900 |
| Measurements | |
| Dimensions (mm): (width x height x thickness) |
55.2 x 113.1 x 22 |
| Weight (g): | 164 |
| Processor | |
| Processor Type: | Texas Instruments OMAP 1710 |
| Clock Frequency (MHz): | 220 |
| Memory | |
| Random access memory (RAM) (MB): | 64 |
| Read-only memory (ROM) (MB): | 64 + Hard Disk: 4GB |
| Communications | |
| Phone: | GSM 1800, GSM 1900, GSM 900, UMTS 2100 |
| Bluetooth: | 1.2 |
| Wi-Fi: | 802.11b,g |
| Other: | CSD, EDGE, GPRS, HSCSD, UMTS/WCDMA |
| Multimedia | |
| Screen Size: | 2.1 |
| Screen Resolution (px): | 176 x 208 |
| Rear camera (Mp): | 2 |
| Speaker: | stereo |
| Output of earphones: | 3.5 |
| Other: | FM-radio |
| Management and input | |
| Buttons: | navigation buttons, physical buttons, numerical keyboard |
| Extension | |
| Connectors: | miniUSB |
| Additionally | |
| Operation time: (according to the manufacturer) |
4 hours of talk time; 8 days standby |