When you set up an alarm and go to sound, click none, does that work or does that not make it vibrate as well?
it will just be silent and wont vibrate.you can google and find a silent mp3 file...Load that as a ringtone on your phone and chose that silent as the sound---that way it will vibrate while playing the "silent" sound.See more details herehttp://www.wikihow.com/Create-an-iPhone-Alarm-That-Will-Vibrate-Without-Ringing