You would need to go into the phone's "Settings" and then "Notifications" and make sure whatever alarm you had set for this still has vibration turned on.
If you aren't referring to an alarm, then I would need more info.
You would need to go into the phone's "Settings" and then "Notifications" and make sure whatever alarm you had set for this still has vibration turned on.
If you aren't referring to an alarm, then I would need more info.