Hey Pedro, thank you for finding the time out of your day to ask us your question about the Samsung Galaxy S25 Ultra. The advertised unlocked Galaxy S25 Ultra is the U.S. version of this device. It is compatible with the following U.S. carriers: AT&T, Boost Mobile, Cricket, Google Fi, H2O Wireless, Mint Mobile, Sprint, T-Mobile, Ultra Mobile, US Cellular, and Verizon. We recommend reaching out to the compatible carrier of your choosing to inquire if this device would receive international wireless services while in Brazil. Reach out to Support if you would like any further assistance. Thanks for being a valued Samsung customer. - Debra