According to sources, the new line up of Samsung Galaxy S20 phones will be the first unlocked phones that work on all of the major US carriers’ 5G networks. There will only be one hardware version of the S20+ and S20 Ultra sold by all carriers, so even if you buy it with a carrier’s firmware pre-loaded, it can be used on other carriers in the future as well.
The S20+ and S20 Ultra are the first phones to support all of the 5G bands and network technology used by all four US carriers, and Samsung confirmed that it can be switched between carriers. Additionally, AT&T sources indicate that the S20+ and S20 Ultra will support improved performance through better carrier aggregation later this year.