If your Google Fi says your SIM isn't active, here's what's going on

Google Fi users began seeing a 'SIM card is no longer active' error starting late March 31, 2026.

Google acknowledged the problem on its support page and said it is working to resolve it.

Affected users reported mobile data loss and no clear pattern of affected regions or devices.

Google support agents suggested a temporary workaround: disable and re-enable international calling in the Fi app.