The Nokia N81 runs on the Symbian OS 9.2, Series 60 v3.1 UI. The phone is compatible with the N-Gage 2.0 mobile gaming service. The Nokia N81 has a TFT display with a resolution of 240 x 320 pixels, 2.4 inches (~167 ppi pixel density) supporting 16M colors. It has an internal memory of 8 GB storage, 96 MB RAM which can’t be expanded.
It also has Wi-Fi 802.11b/g with UPnP and Bluetooth v2.0 with A2DP. The phone has 2MP camera with 1600×1200 pixels, LED flash and provides video recording of QVGA@15fps. The battery of the phone supports a Talk time of 3 hrs and a stand-by time of 410 hrs.