Hi there Julia, thanks for reaching out to ask us your question about the Samsung Galaxy A36 5G. U.S. device refers to the region that this device is compatible with. For instance, this device was created to be compatible in the U.S.A. with the following U.S. wireless carriers: AT&T, Boost Mobile, Cricket, Google Fi, H2O Wireless, Metro by T-Mobile, Sprint, T-Mobile, US Cellular, Verizon, and Visible. Hope that helps! Feel free to contact Support at your leisure if you'd like further assistance. Thanks for being a staunch Samsung customer. - Debra