I've posted this on other forums but no one has really come across this. The vibrate function on my phone appears to only work intermittently. It doesn't matter if the phone is silent mode, if I install the "ibrate through apptap, or if I toggle the vibrate function in the sound menu. My phone is unlock to use in Canada and currently runs 1.1.2 with iTunes 7.5. I have tried restoring and going back in firmware, but it doesn't make a difference. BUT if I turn the silent mode switch on and off like 10 times fast it I might run and then work for another day. Any suggestons?