I've posted a couple of threads on here re keeping an eye on your data use (i.e. how do you do it / what eats up the data etc). I can give an update that I finally managed to access my on line account with Vodafone today and one of the things that it does show is your data usage each day (with a breakdown of it) - albeit that their is a time delay that it will only show up to approx 2 or 3 days previously. Anyway, I was concerned re how quick data is used and it turns out quite rightly so!!!! I only got my phone on Weds evening and spent the evening setting it up, personalising it etc plus I surfed for approx 30 mins (NB I didn't download anything, view youtube, run any apps). Well I still managed to use 20MB that evening just setting the phone up!! That doesn't make sense (NB there is another post on here somewhere from someone saying that their girlfriend's phone - on Orange - is eating data for no reason). I've been down to the Vodafone store today re this and they've looked everything up on system and said no prob and everything set up correct and fine!! Needless to say I'll be keeping a very close eye on my vodafone account data usage log and I would therefore recommend all newbies that haven't had their first bill yet do likewise.