That is a great question. You have the option to change it via your My Verizon or your device itself. Follow this link to figure out how to do this via your device, https://www.verizonwireless.com/support/knowledge-base-17076/. As for your doing it via your My Verizon, you can find out how by following this link, https://www.verizonwireless.com/support/knowledge-base-143805/.
Follow us on Twitter @VZWSupport
If my response answered your question please click the Correct Answer button under my response. This ensures others can benefit from our conversation. Thanks in advance for your help with this!