Wow. Passwords on the phone? You've changed the password strength from a combination of 26 lowercase letters + 26 upper case letters + 10 digits + 30 punctuation characters to just 12 characters. For an 8 character password that goes from (92^8)/2 to (12^8) permutations of characters.

But this is silly really, because I've never seen a case sensitive phone keypad, which is part of their complexity requirements.