If I understand you correctly, you want to turn off voicemail and sms? If so this has to be done from your account and will be done by VZW CS or TS reps.
thesuz is correct. it's double notification which is really annoying. if i get a vm i normally disregard it cause all imp ppl know to text instead when i dont answer. then you leave the phone alone for a while and you see you got text and vm so u check and u find out that the txt is just notification of vm so you could of just not checked the phone, this is the degree of my laziness.
