I have Find My iPhone set up on my MacBook, iPad 2 and iPhone 4, and it works perfectly on all devices when locating my MacBook and iPad 2, but it can never find my iPhone. I have it sat next to me, connected to our wifi network, and perfectly capable of locating the other devices, but it won't be located itself. I've tried reinstalling the FMi app, but to no avail. Has anyone else had this problem and found a solution, or do you have any advice for resolving it? Thanks!