Fi is built on top of GV, from what I understand (Googler FYI but not on Fi team + only speaking from being a Fi user myself for a couple years). If you're wor

Fi is built on top of GV, from what I understand (Googler FYI but not on Fi team + only speaking from being a Fi user myself for a couple years). If you're worried about the ability to port your number back to Google Voice, just use a different Google account? Also just signing into the page to look at the devices is not going to hijack your GV.