Google Fi is taking a big step into retail today, with Best Buy now selling SIM cards for the MVNO at over 500 of its stores. The Fi SIMs cost $9.99 each at purchase, but you’ll be credited $10 toward your service within a week of activation. Here’s the link where you can check to see if your nearest store is selling them yet.

For now, Best Buy is only selling the Talk and Text SIM cards. If you’re looking for data only — for a tablet, perhaps — you’ve still got to get that directly from Google Fi. But the move to Best Buy shelves is still a significant boost of exposure for Google Fi, which will now be located near other prepaid services and devices at Best Buy locations. Both new and existing Google Fi customers can purchase a SIM, though there’s a limit on the rebates existing customers can get. (They’re always available for free from Fi’s website, but this might be faster if you can’t wait for shipping.)

Google Fi starts at $20 / month for unlimited calls and texts, plus $10-per-GB for mobile data. Late last year, Google announced a major expansion for Fi that added support for many more devices (including iPhones) and dropped the former “Project Fi” branding. Moving into brick-and-mortar retail is yet another sign of continued growth. Strangely, Google Fi’s Reddit post about the news notes that Best Buy employees will not be able to assist with customer activations, so the retailer seems to be taking a bit of a hands-off approach. But Google’s got a step-by-step tutorial on that process should you need it.