If you can wait until June/July, then get a v.5 iPhone. I skipped the 3Gs and went from 3 to 4, and the difference was astonishing; if I go back to the old 3 for some reason, it’s soooo sloooooowwww. Personally I’ve never had call issues, but having said that I’ve got a clear plastic Belkin case on mine, plus a clear screen protector. You only have to look at the state of the case to see that it’s worth having just to keep a pricey and nice looking bit of tech in good nick, especially considering the good second-hand prices iPhones fetch. My contract means I’ll get an iPhone 6 next upgrade, which’ll be interesting. As others have said, the camera really is stunningly good, but things like the GPS are also very good indeed. I love mine, it’s in continual use, and battery like can be an issue, but I spent a day in London recently, using the GPS extensively, the camera, and ebook on the train up and back and in the station bar for a couple of hours, and it lasted from 8am to gone 11pm, which I thought was pretty good. You can get a back-up battery from Amazon that’ll charge two phones at once for £22.