I have an HTC Touch Diamond smartphone. It came with Vodafone Satnav, which I've used a couple of times (when I've forgotten to take my PDA with me, which has Tomtom on it). Vodafone SatNav uses the built-in GPS facilities on my phone. I also have an "unlimited" dataplan from Vodafone, because it costs only £5 extra per month, and I'd use more ( Read more... )