1st of all thanks for your great support
2nd i made upgrade to my phone N8 to bill software and its woking normally up to yesterday suddenly i found vibration on my phone not working however my phone didn't clash or down .
coul you please to support us
thanks & Best regards
Welcome to Nokia discussions board!
In order to fix this issue, I advise you to perform a soft reset. Type *#7780# on your phone's keypad.
If the issue persists, please reinstall the update using Nokia Suite.
Let us know how you get on and feel free to post any other questions you may have.