The Nokia N81 suffered from lower sound output due to the release of the new firmware version. According to Nokia, they must follow an international standard wherein a device's initial or default volume must be set to low to avoid any damage to its users.
| Feature |
Specification |
| Form factor |
Slider |
| Operating System |
Symbian OS 9.2, S60 3rd Edition, Feature Pack 1 |
| GSM frequencies |
850/900/1800/1900 MHz |
| GPRS |
Yes |
| EDGE (EGRPS) |
Yes |
| WCDMA |
Yes (2100 MHz only) |
| Screen |
240x320 pixels, diagonal 2.4", 16 million colors |
| CPU |
Single CPU, ARM 11, 369 MHz Freescale MX300-30 (as in Nokia E71, Nokia E51, Nokia 5320) |
| Internal Dynamic Memory (RAM) |
96 MB |
| Internal Flash Memory |
12 MB (24 MB on Firmware v20 and above) |
| Camera |
Main (rear) 2 Megapixel camera; frontal CIF camera for video call |
| Video recording |
Yes, MPEG-4 (320x240) of up to 15 frame/s |
| Multimedia Messaging |
Yes |
| Video calls |
Yes |
| Push to talk |
Yes |
| Java support |
Yes, Java MIDP 2.0, CLDC 1.1 |
| Memory card slot |
Yes, microSD, up to 4 GB |
| Bluetooth |
Yes, 2.0 (A2dp) |
| Wi-Fi |
Yes, WLAN IEEE802.11 b/g with UPnP (Universal Plug and Play) support |
| Infrared |
No |
| Data cable support |
Yes, USB 2.0 Full Speed via Micro USB interface and mass storage class support to support drag and drop |
| Browser |
Nokia Web Browser with Mini map |
| Email |
Yes, Easy-to-use e-mail client with attachment support for images, videos, music and documents (POP3, IMAP4 and SMTP) |
| Music player |
Yes, Stereo handsfree speakers |
| Radio |
Yes, Stereo FM Radio with Visual Radio support |
| Video formats |
MPEG-4, H.264, H.263/3GPP, RealVideo 8/9/10 |
| Audio formats |
MP3 (VBR), AAC, eAAC+, AAC+, WMA/M4A, WAV |
| HF speakerphone |
Yes, with 3.5 mm audio jack and A2DP wireless stereo headphone support |
| Battery |
Nokia Battery (BP-6MT) 1050 mAH |
| Talk time |
up to 240 minutes GSM / 180 minutes WCDMA |
| Standby time |
up to 17 days |
| Weight |
140 grams |
| Dimensions |
102x50x17.9 mm |
| Availability |
Q4/2007 |
| N-Gage (service) |
Yes |
An 8 GB version of the Nokia N81 is also available. The only difference is the lack of the Micro SD slot. The phone treats the 8 GB as a Micro SD, while keeping about 25 MB of it, to itself.
The device is also known for being a gaming-dedicated device because it can be played as a typical game console. The device comes with 2 dedicated gaming keys that can be used on N-Gage games and other applications.
