Verizon claims it will be the first US carrier to offer the Samsung Galaxy S10 5G, which will be available in the first half of this year (the global launch is in the Spring). Sprint will also offer the 5G model, but in the Summer. T-Mobile has announced plans to carry the Galaxy 5G and Galaxy Fold, but without giving a time frame. Same for AT&T, the 5G and Fold are coming "later this year". However, AT&T will offer a second 5G phone from Samsung in the second half of this year. Starting today, the 4G models can be pre-ordered from the four major carriers. Verizon, T-Mobile and Sprint...
Source: https://www.gsmarena.com/verizon_will_be_first_to_bring_galaxy_s10_5g_to_the_us_tmobile_and_at_t_are_bringing_the_galaxy_fold-news-35625.php