Remember the Nokia N-Gage? Nokia's original attempt at a gaming platform fell a bit flat in most (but not all) markets and largely sank without trace. But Nokia didn't give up on the idea of advanced mobile gaming, and now it's back with a vengeance on the Nokia N81 plus some other smartphone devices in the Nokia range.
So what exactly makes up the Nokia N81? Well, this is a 3G slider with a 2.4" 240 x 320 pixel display that works in landscape (wide) and portrait (tall) orientations. On the back is a 2 megapixel camera, and the N81 also has WiFi and Bluetooth connectivity which can also be used for gaming. There's an FM radio too, and the N81 runs the Symbian S60 operating system, making it a capable smartphone

Source : mobilegazette