Bro.
Phone Vibrate after Writing Backup,
So very simple, if you have Backup & you having too,
Phone need to be Erase this moment to resolve it,
Simply follow steps here:
http://forum.gsmhosting.com/vbb/f550...an-do-1443542/
After Erase, Flash it latest Firmware of it's Product Code & Restore Backup will solve it.
BR,
ZUBER