Save up to $500 on the new Samsung Galaxy Z Flip4 and Z Fold4 on Fi. Order now
Phones designed for Fi are built with a unique technology that keeps you covered by seamlessly switching between multiple major networks and secure Wi-Fi connections. Learn more
Fi is in beta for iPhone®. Bringing your iPhone® to Fi requires some extra setup, like changing a few of your Settings. We'll walk you through it step-by-step, and our support team is always available if you need help. Currently, iPhone® does not have network-switching technology, and 5G is not supported for iPhone®, but you'll still get great coverage. Learn more
Fi works on most phones, but we always recommend checking your phone's compatibility before joining Fi. If your unlocked phone is compatible with T-Mobile's 5G network, you'll have access to 5G on Fi.