Fuze Mobile can dynamically use both Voice over Internet Protocol (VoIP is free to use anywhere you have a WiFi connection), and your cellular data carrier plan (message and/or data rates may apply) so that you can use Fuze wherever you are.
The first time you sign in to Fuze Mobile you can enter your phone number and select whether Fuze Mobile uses VoIP, carrier data, or both.
Additionally, you can update your Fuze Mobile data configuration at any time via the Call Settings section of the Settings screen in Fuze Mobile.
See the article Fuze Mobile Call Settings for more details about configuring these settings.