Customers can find an online guide for Comcast's wireless phone service on The voice service comes with several features that customers can turn on or off at their convenience. provides a video tutorial for customers to set up and activate their voice services. It also provides information about setting up voicemail and directions for checking the voicemail. Some features of the voice service have online access to ensure accessibility and convenience. Xfinity provides the numbers that customers can use to activate or deactivate particular features on their voice services. The features differ depending on the plan a customer chooses.