Next up we have software themes. Now, Nokia refers to these as the ‘organic, living wallpaper that match your mood for a unique look', (sic - I quote the Nokia website). What it boils down to is several themes that involve shard-like designs and ‘light effects'.
The light effects let you choose between 49 colours for the backlight to the number pad (which is entirely dark when it is not in use) and a matching light bar which sits on the top edge of the screen to left and right of the mains power jack and pulses gently. It seems to pulse constantly and will pulse with more vigour to deliver alerts of various types. It is not hugely exciting.
Before I leave this aspect of the phone completely, I'll just let you know that it comes with a lurid purple shiny carrying pouch complete with chunky chain, and a bandana. Go figure.
So much for the style, then, which may or may not take your fancy. The substance places the Nokia 7900 Crystal Prism into the mid-range. This is a quad-band handset with a slightly taller than average candybar design. At 112mm tall it feels slightly lanky in the hand and pocket, though its 45mm of width and 11.3mm of thickness are much more like the norm. It weighs 101g.
The main screen is an OLED with offers 16 million colours and 240 x 320 pixels in an area measuring 2-inches across the diagonal. It is unproblematic to read indoors, but outside, and particularly in bright sunlight, it suffers. I often needed to shade it with a hand to read incoming texts or frame camera photos, for example.
The phone runs S40, and as such is a way behind the capability of the top-end S60 that is found in many other Nokia handsets. S40 is not a write-off by any means, but it doesn't have the panache of its bigger, bolder, brasher sibling.
Still, the Nokia 7900 Crystal Prism can number among its applications mobile email support, a pre-installed version of Yahoo! Go, alarm clock, calendar, to do list, notes taker, calculator, countdown timer, stopwatch, voice recorder, FM radio and music player. Opera Mini was pre installed on my review handset for Web browsing.