We have 2 3G iPhones in our house. We both charge ours on different desks. For some odd reason though, my charger acts insane sometimes. (Keyword is sometimes, about 60% of the time) If my charger is plugged into the wall my phone will act like its connecting and disconnecting. If it's on vibrate it will vibrate as if its being connected and being disconnected every 2 seconds. Same goes for when the sound is on, it will make that connect /disconnect noise. Now the weird part is the fact that the other iPhone we have will charge fine when connected. YET, my iPhone charges fine when its plugged in the other charger that isn't mine, and also when it's plugged into the computer. Is my charger possessed or what? Not sure how i'll explain this to a genius but i guess it's worth a try.