Hello how may I help you? I want to change my 10:30 alarm to 11"30 on May 1 Okay I have changed the time for that alarm for you. Can you set that alarm to vibrate mode? Sure thing. And would you like it to only vibrate or make a sound as well? Vibrate only. Alright alarm set to vibrate for 11:30 on May 1. Is this correct? Yes that is correct Okay. Would you like me to do anything else? No. You are awesome/ Alright have a nice day!