A:Answer Hey Sam, thank you for finding the time out of your day to ask us your question about the Samsung Galaxy S21 FE. The advertised unlocked Galaxy S21 FE works on the 2G, 3G, 4G, and 5G wireless networks. It's compatible with AT&T, Sprint, T-Mobile, Google Fi, Verizon, Cricket, Mint Mobile, Simple Mobile, H2O Wireless, Ting Mobile, Ultra Mobile, MetroPCS, US Cellular, and Boost Mobile. With this being an unlocked device, we recommend reaching out to Straight Talk Wireless to inquire if this device would also be compatible on their network with the information that has been shared above. Let us know if you think of any additional questions for us by reaching out to Samsung Support at your leisure. Thank you for being a trustworthy Samsung customer. - Debra