Having read all the threads about poor visibility of dials on the Ducato and having tried bits of lights etc and looked at all the stand alone GPS units around I have decided to go with using a smartphone with a speedo app loaded. I’ve asked all the younger members of the family if they have an old phone in a drawer somewhere but none suitable. I am now looking at either cheap new ones or one off e bay. I know it sounds a bit OTT but it will have other uses. My question is, what do I need in terms of memory etc. I can get a new phone off Amazon or E bay for £26 seems like a basic, probably Chinese smart phone or am I better going for a second hand one with more memory??? I intend to play around with a few different apps to see which is best & then if space available perhaps put a mapping/sat nav on as a back up. Thanks