The vibrating iPhone problem

One of our iPhones was vibrating whenever you placed a call. That wouldn't necessarily be so bad but it continued to vibrate the entire duration of the call. Ever held a vibrating phone to your ear and tried to carry on a conversation? Fortunately powering off and back on solved the problem but it is odd to say the least.




My iPhone does that too but turning it off and back on won't solve the problem. Any other advice??

I have the same problem

It JUST started to happen.
I received a call at the same time I was making one.
Since, it vibrates during all calls.
This looks like a BUG.

Anyone know more about this?