Instead of a 512 MB Flash memory chip, the N91 uses a 0.85" 4 GB hard drive to store multimedia data. In addition to a 3.5 mm stereo headset jack, the phone integrates many features that are expected from higher-end phones these days, including support for Wi-Fi and Bluetooth, an integrated 2-Megapixel (1600x1200) camera, a radio receiver, a 262-color LCD, PC-synchronization and a decent headset. Of course, these features do not come cheap, as the N91's $600 price tag (without carrier contract) exceeds even the price range of your typical business smartphone.

Nokia said that it will sell the phone initially only online online at http://www.nokiausa.com.