A voice recording, made by a person who doesn't identify itself, and doesn't know my name, called to say the IRS was filing a lawsuit against me and I should urgently call a 1-600 number. The IRS does not operate this way!
I also am a Google Fi user. I have received 6 calls over 3 weeks' time, at various times of the day and evening. I have been tempted to answer and tell them never to call back, but was afraid they would call more often if they knew the call might be answered. Best thing to do is to block the number.
SCAM: Hello, this is the Alert System with Visa Mastercard Accounts Services with an important notice before the next billing period. Congratulations on an excellent payment record. You now qualify for zero percent financing on a new personal loan. Press 1 to talk to one of our qualified service agents.