US Cellular was added later, but Google Fi has now dropped the carrier as an official network. In June of 2016, Project Fi partnered with US Cellular for a total of three available networks.

CHICAGO, Ill., Feb. 22, 2023 /PRNewswire/ -- Hologram, the leading IoT cellular connectivity platform, today announced the next-generation Hyper SIM with network fallback.

With Android 13, Google enabled “VoLTE roaming for many U.S. and global carriers” on the Pixel 6a. All other first-party phones got this support with the June update.