I have my iPhone turned off right now, completely off as I just replaced the 18 month old battery and I was putting the phone back put together on the table and accidentally hit the silent switch with my hand and the phone vibrated.....Is this the case for anyone else? I've been playing with the switch and it does it each time even though the phone is 100% off. I was also receiving text messages, just couldn't see them. I turned it on finally by pressing both buttons and resetting it as it wouldn't come on with just the sleep button and shut it off again, this time it's actually off. Wow, that was weird, has that happened to anyone else?