Good day Jorge, thank you for finding the free time out of your busy day to ask us your question about the Samsung Galaxy S25 Ultra. The advertised Unlocked Galaxy S25 Ultra (U.S. version) is compatible with the following U.S. wireless carriers: AT&T, Boost Mobile, Cricket, Google Fi, H2O Wireless, Mint Mobile, Sprint, T-Mobile, Ultra Mobile, US Cellular, and Verizon. Feel free to contact the compatible wireless of your choosing to inquire if this device would be fully functional while in Argentina. Let us know if you have any other questions by contacting Support. Thank you for being an unwavering Samsung customer. - Debra