Who I have the same questioned this topic

I want to set a reminder to go off every 3rd day. I should be able to do this, but when the screen comes up that tells you to put the number of days in (Every X Days) the phone will not let me change the defaulted "1" to "3". I KNOW that it can do it because I just deleted a series of reminders for every three days and was just trying to set up a new one. I know I had difficulty setting it up initially, but can't recall what I did to make it eventually work! Someone out there has GOT to be able to help me! Please?