Or you can go cheap and get this one from mountguys.com. $15.89 It says fits 3G, 3GS and 4. The ramball mounts are indeed better and more versatile in the long run. I use one of these cheapos for a cheap TomTom, right in the center of the bars I'll admit that it isn't the easiest thing to get setup right. Motorcycle / Bike Handlebar Mount for Apple iPhone Fits 3G 3GS 4 & Touch It fits 1 inch handlebars, so it will come with two strips of rubber to fit up on 7/8 inch metrics. It looks like there are some differences between mounts for iPhone, 3G, 3GS, 4G, CaseSkin, OtterBox, ToughCase, etc. Get the right one. Lots of mounts for iPhones on the website: iPhone iPhone 3G and 3GS iPhone 4 CaseSkin or OtterBox ToughCase