Everybody has one. Well, almost everybody.

The Pew Research Center reported last year that 96 percent of Americans had a cellphone or smartphone. Which means the merger of T-Mobile and Sprint — a deal that moved significantly closer to completion on Tuesday — will have a ripple effect across the country.

A United States District Court judge batted away the last significant challenge to the planned merger when he ruled against a lawsuit filed by state attorneys general who argued that the deal would hurt consumers. Now the millions of people who receive bills from Sprint or T-Mobile are wondering what happens next.

What will happen to customers of T-Mobile and Sprint?

T-Mobile and Sprint have said they will try to close the deal as early as April 1, creating a supersize carrier (called, wait for it, T-Mobile) with more than 100 million customers.

The two companies still have one last hurdle to clear: the California Public Utilities Commission, which is still reviewing the merger.