This table shows the major differences between Cellular and Wi-Fi:

Cellular (LTE, 5G, EDGE, etc.)Wi-Fi (Provided by ETS and your community)
Offered by mobile carriers (AT&T, Verizon, Sprint, T-Mobile, etc.)Multiple Wireless Access Points (transmitters) are installed by ETS throughout your community. They are often mounted on a ceiling or wall.
Covers large areas (cities, towns, etc.) using outdoor towersLocation-based and covers smaller areas such as offices, residential buildings, cafes, airports, homes, etc.
Users purchase plans for a certain amount of data per period (10 GB, 50 GB, Unlimited, etc.)No data limits while connected to the ETS network
Useful for simple internet activities while on the go (checking Email or Facebook)Generally much faster than cellular, perfect for data-intensive activities (Skype, Netflix, Youtube, downloading music, etc.)
Primary method for calls and SMS text messages
Wi-Fi calling can be used for calls and texts if your carrier and phone support it. Usually this setting needs to be enabled via Settings.