If you have an iPhone Verizon, there are a few ways to turn off voicemail. The first way is to go to the Settings app and select the “Phone” tab. Then, under the “ Voicemail” heading, select the “Turn off voicemail” option. Another way is to go into your phone’s settings and select the “Call history” tab. Under the “Call history” heading, select the “Turn off voicemail for all calls” option. Finally, you can also turn off voicemail by going into your phone’s settings and selecting the “General” tab and selecting the “Turn off voicemail” option.