Orange’s range of Windows-based smartphones has undergone several iterations since the original <a href="http://reviews.zdnet.co.uk/hardware/mobilephones/0,39023925,10002142,00.htm">SPV</a> -- the first Windows smartphone to hit the UK back in 2002. Orange was a trailblazer in this market, but now has to compete with other operators and with operator-agnostic devices. The SPV C600 follows hot on the heels of the C550 model, which was launched in July. The latter was very much a stopgap, while the SPV C600 is the first Orange handset to feature Windows Mobile 5 for Smartphones.