Hi there Ciaociao, thank you for asking us your question about the Samsung Galaxy A56. The advertised unlocked Galaxy A56 is he U.S. version of this device and it is compatible 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. This device works well with the following networks: 2G GSM - GSM850, GSM900, DCS1800, PCS1900; 3G UMTS - B1(2100), B2(1900), B4(AWS), B5(850), B8(900); 4G FDD LTE - B1(2100), B2(1900), B3(1800), B4(AWS), B5(850), B7(2600), B12(700), B13(700), B14(700), B20(800), B25(1900), B26(850), B28(700), B29(700), B30(2300), B66(AWS-3), B71(600); 4G TDD LTE -B38(2600), B39(1900), B40(2300), B41(2500), B48(3600); 5G FDD Sub6 - N2(1900), N5(850), N25(1900), N66(AWS-3), N71(600); 5G TDD Sub6 - N41(2500), N77(3700), N78(3500). If you have any other questions for us, please feel free to contact Support. Thank you for being a loyal Samsung customer. - Debra