Mobile Phones Google What Google Voice Cannot Do Limitations of Google Voice Share Pin Email Print Shan Shui/Getty Images Google iPhone & iOS Android Samsung Google Ringtones By Nadeem Unuth Freelance Contributor Nadeem Unuth is a former freelance contributor to Lifewire who specializes in information and communication technology with a focus on VoIP. our editorial process LinkedIn Nadeem Unuth Updated November 27, 2018 Google Voice does many things and can be very helpful for many, as it stands out by the features it offers. However, many users do not simply register for the free service but intend to use it for their businesses or other serious life activities. It may imply changing numbers, porting numbers, buying new phones, and arranging new settings etc. It is therefore good to know what Google Voice isn’t, what it can’t do and what its limitations are, so one can decide on whether or how to use it before diving. Not Outside the US You Can’t Start Calls From Your Mobile Phone No Free Worldwide Calls Gmail free calling Not a Phone Service how Google Voice works Not a Softphone No Video Calls video calling apps and services Not SIP Service VoIPSIP No MMS Not Direct User Support Google Voice does offer a lot of frequently asked questions and a whole knowledge base of questions and troubleshooting information on its web site, but there is no possibility for users to obtain direct support, either through phone or email. This is comprehensible as millions of people are using the service for free.