Yesterday O2 added a new phone to its business handsets portfolio called the O2 Xda Graphite (pictured). It's an O2-branded product, made by Asus, that runs on Windows Mobile 5.0 Smartphone edition.

In the UK, there are more mobile phone handsets than there are people, and it's hardly surprising -- nary a day goes by without a new phone release. The latest to join the fray is the O2 XDA IQ. Based ...