Hey guys Booked an appointment @ the genius bar for the weekend. I have an iP4 that is in warranty and the vibration has stopped working (properly). I have restored it back to factory settings, still the same. It very often (and presently) doesn't vibrate when the phone rings despite being turned ON in settings and the phone doesn't vibrate when you turn the silent switch on and off. I have got it to work on occasion, I would say it is a temperamental fault. Assuming no water damage or physical damage, do you think they will just swap it straight away? I understand they just need to repeat the fault once and they can then swap it for a new one (at least this has been my previous experience at the genius bar). Anyone had any success with getting replacements as a result of the phone's vibration not functioning properly?