The O2 is a good option for business consumers who want the convenience of a phone integrated with their PDA.

The O2 XDA IIi keeps many of the features we liked in the earlier model, while also boosting processing power.

While it won't appeal to everyone and comes with a hefty price tag, the Flame certainly does an excellent job of providing a great multimedia experience, thanks to an on-board graphics processor and quality display.

For those who like the idea of practically carrying a mini-notebook in their pocket, the E90 Communicator is one of the most comprehensive available. It won't appeal to everyone but despite the lack of TV-out and fax features, it is the best of business phones.

A very good phone in terms of features, but way too large and heavy for most people.