Google Fi seems to prioritize T-Mobile networks in my experience, maybe monetary related, but they had terrible signal near me. I got an app on the play store

Google Fi seems to prioritize T-Mobile networks in my experience, maybe monetary related, but they had terrible signal near me. I got an app on the play store to force it to US cell, but I constantly had to switch it. I wouldn't trust the Google Fi app to "automatically choose the best network" _for you_.