O2's attempt at the all-singing, all-dancing convergence device over-extends itself.

A phone that's bursting at the seams with extras; possibly too many for its own good.

Much like the PC and component market, mobile phones have a product lifecycle that changes so rapidly it's hard to keep up. Panasonic has stayed with their tried and true clamshell design, first made popular by the GD88 and continued with the X700. This handset turns their previous generations upside down, offering Panasonic's first smart phone based on Symbian OS version 7.0.

The 650 really picks up where the 600 left off, and while it doesn't look too different to the eye, many of the changes are under the hood or subtle manipulations of the 600's design. It runs the new Palm OS 5.4 and has a much faster 312MHz Intel PXA270 processor, but the most immediate difference is the screen: it's now double the resolution at 320 x 320.