There is 5G in some areas already, including parts of your area (although there is only 1 5G phone that you can actually get right now), however it will be many years before 5G covers most areas. 4G is in most, but not all areas and will be for many years to come. 3G and 2G is still in some areas also, but those transceivers are scheduled to be deactivated at the end of 2019 for most, if not all areas. Some of those areas will get 4G or maybe 5G before the shutdown, others MAY (but don't count on it) have the 2G or 3G service still active, and some areas will lose service for an undetermined period of time.

In the areas I travel through in the western U.S., some areas have already lost Verizon service, because Verizon was leasing space on competitors' cell towers, and they decide to end that practice.

It will depend on what area you live in or travel to with regards to what service will be available.