The issue people are facing today — in addition to Fi customer support not having updated instructions — is when transferring service from an old iPhone to the new model. They are coming across a “Your SIM is Not Supported” screen.
To get around that, tap “Other Options” to “reveal the QR code and complete eSIM activation.”
Google also advises that you first delete the old iPhone’s eSIM. Meanwhile, after the QR code process (which can be attempted again from Settings > Cellular > Add Cellular Plans), enter the following details in Settings > Cellular > Cellular Data Network to get full service:
Then open the Google Fi app to continue. More instructions are available here.
- Cellular Data APN: h2g2
- LTE Setup APN: h2g2
- MMS APN: service
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- MMS Max Message sizer: 23456789
- Optional: Personal Hotspot APN: h2g2-t
