Part of the Nseries, the Nokia N91 is a complete music companion that comes with the latest multimedia and smartphone capabilities. Based on the Symbian OS v9.1, it has a 4GB hard disk and storage capacity of up to 3,000 songs. Resembling an MP3 player, it has a slide phone form-factor with the music player controls on the top. On sliding this down, the key-pad comes into view. The phone features a brilliant 256K TFT, 176x208 display screen. Even when on stand-by, it displays the music that the user is listening to, and supports MP3, AAC, Real, WAV, WMA, M4A, AMR-WB, True Tones and AMR-NB file formats. Users can customize the way they listen to music with features like a five-band equalizer, DRC (Dynamic Range Compression), a mixer and other features. Sorting out 3,000 odd songs can be quite a task, but this phone enables one to edit the Meta data for tracks. One can listen to music through the external speakers or the Nokia HS-28 headset that comes with a remote control. The 4GB hard disk can also be used for storing videos, ringtones, images, multimedia messages and other applications. An additional 30MB helps in storing contacts, other notes and messages. The phone also has a visual radio where certain radio stations offer visual and text display. The 2- megapixel camera can take pictures up to 1600x1200 pixels in resolution with an 8x zoom, plus a whole load of other functions, while videos can also be recorded. The phone has 3G capabilities, WLAN for hot spot connectivity, USB and the Nokia PC suite to connect to a PC, or Bluetooth for wireless connections. For messaging, there is a convenient e-mail client. Images, videos, text, and audios can be combined into one MMS; images are automatically resized to fit in a multimedia message. Compatible with the Nokia wireless keyboard, the phone supports Java MIDP 2.0, CLDC 1.1 and JTWI 1.0 for games and applications. One can also vocally activate a number of functions, like dialing and other voice commands. At about 160g, the Nokia N91 is a fairly heavy phone. However, it has amazing storage capacities and an equally remarkable user interface.