While there is free wifi at many hotels, coffee shops, the service can be slow and is not necessarily secure. Having extra high speed data on your phone can save time and frustration. In the case of some hotels that charge for wifi, using your phone’s data (if you are using a local sim with a data bundle loaded) will also save you money.
If you’re at a hotel that charges for wifi don’t forget that you can use your phone as a personal hotspot to support your computer or tablet.
Most restaurants in the USA have free wifi, just ask your waitron for the details.