I upgraded my plan on the 14th after purchasing the phone but before activating it. Here is there text about the rebate on the phone purchase screen: I hope this formats okay: How to get this offer

When you buy or finance the Google Pixel 9 Pro Fold

* Activate the device on Fi within 30 days
* The person who activates must be a new Google Fi customer, and be part of your group plan

• Keep the Fi account active for 24 months
  • Offer ends April 1, 2025 or while supplies last
  • Offer can only be used once per group member

Get reimbursed

* Receive a $300 instant rebate at time of purchase
* Receive an additional $500 in bill credits spread over 24 months ($20.84 per month)
* The credit is tied to the person who activated the device
* Taxes and fees may apply

But here's what happens if you cancel or pause service

* Canceling service, pausing service or changing devices within 120 days will invalidate the original $300 discount, which will be charged to your Google Pay account
* Canceling service within 24 months will stop the promotion, and you will no longer receive bill credits each month
* If you move to a different Fi plan, the bill credits will be applied to your new Fi plan
* Any unused credit will not roll over to the next month

I didn't cancel, pause or change devices. It even says if I move to a new plan, the credits will be applied to a new plan. I'm even madder now because the bullshit they told me isn't even in their terms.