Major mobile carriers like Verizon, T-Mobile, AT&T and the rest do not charge for domestic roaming calls and messages. There is a map of Verizon's coverage area on their website, which is basically the entire US. Verizon partners with other carriers to provide uninterrupted coverage if you leave Verizon's coverage area. This domestic wireless roaming is free.
How much does Verizon charge for international roaming?
The roaming situation changes when you travel internationally. Roaming charges can quickly add up. If you're a Verizon customer, you'll need to understand your carrier's roaming policies to avoid unexpected roaming charges when traveling outside the United States.
Domestic wireless roaming is free on all Verizon plans nationwide. That means your mobile device can connect to a non-Verizon network in the United States, U.S. Virgin Islands, or Puerto Rico at no additional cost.
Except on a few old plans, you don’t pay any domestic roaming fees. Instead, these roaming minutes are treated like regular Verizon minutes. If your plan allows 60 minutes per month, you’ll be allotted the same 60 minutes when you roam domestically. The number of minutes doesn’t change because you’ve left Verizon’s coverage area. You probably don’t realize that.