I just recently got my Galaxy S5 running 4.4.2, and I like to use the Calendar app to schedule my events. I have the notification settings set to Status Bar Notifications, Knock sound, and vibration On. I keep my phone ringtone on vibrate all day, and the other notifications in the window, that pops up when you use the volume keys on the left side, are down all the way. With my daily events, I cannot have my ringtone or other sounds on that may distract others around me if I get a call or text, or am just navigating through the phone. My problem is that whenever I have a calendar event set to notify me, say, 15 minutes beforehand, I get the notification like I am supposed to, but I get no vibrate. I also don't get any vibrate when the actual event starts 15 min. later. What can I do to fix this problem? Thank you in advance, and let me know if I need to provide any more info.