Yeah. I was one of the earlier users, the number identifies as GV-Grandcentral, formerly Bandwidth

It's basically rejected from every messenger, I can't use it with paypal or banking, etc.

Same problem but with normal google voice numbers. Really frustrating.

I want to use virtual numbers to avoid the spammers. There have been plenty of companies that had pseudo dodgy signup (win a chance for a dream trip to somewhere) where you had to give up your phone number (supposedly so they could call you). Lots of time I get spam calls that claim I gave permission for them to call me. So a temporary forwarding number hides me. I use my google voice number for this and it does a good job of noticing lots of spammers (but not all).

The google fi number isn’t your T-Mobile phone number. There is actually a way to find the actual t-mobile phone number that Fi forwards to, perhaps you can get that and use it instead.

Google Fi is Google Voice routed through T-mobiles network