Are you still having issues with GoogleFi? Visible just recently
mentioned this issue was resolved. Also Mint mobile trial sims are free
and overnighted via FedEx straight from Mint. Order from their site. No
need to pay.
Perhaps try searching Reddit/Google for "Visible APN Settings." There
are ways around getting an incompatible phone on their network but it
likely wont be supported by Visible if you run into issues. I don't
know. I'm just a guy using an unsupported ...