In the US, at least, Google Fi is essentially a T-Mobile MVNO. It was previously T-Mobile, Sprint, and U.S. Cellular, but T-Mobile bought Sprint, and U.S. Cell

In the US, at least, Google Fi is essentially a T-Mobile MVNO. It was previously T-Mobile, Sprint, and U.S. Cellular, but T-Mobile bought Sprint, and U.S. Cellular divested a fair amount of its network. I saw conflicting reports about whether Google Fi was affected by T-Mobile's reported text message censorship. I don't know where it stands on this iCloud Private Relay issue.