Best answer: Most phones with 5G can be brought over to another carrier, however access to the full network, or even 5G, depends on whether the phone supports the right frequency bands . If you want to switch, consider buying an unlocked phone that works with all carriers.
Read moreWill 5G phones work on 3G network?
Although 3G and 5G use different technologies to send and receive data, they operate at some of the same frequencies. But according to AT&T, they can’t coexist on those frequencies — the airwaves assigned to 3G customers cannot also be used for 5G customers .
Read moreCan you use a 5G phone on 4G?
5G isn’t replacing 4G any time soon. In fact, they will coexist and work together. 5G capable phones can actually use both 4G and 5G technology .
Read more