Just a few months ago Google added US Cellular to the Project Fi lineup, allowing the service to pick the fastest network between T-Mobile, Sprint, and US Cellular when users are here in the US. Today, Google is making a similar announcement for international coverage, adding the cellular carrier Three to the lineup of international carriers.

Project Fi has always worked internationally in 135 countries, with data costing the same as it does in the US ($10 per GB). The downside was that it was very slow—you'd be stuck with 3G-ish speeds. Today Google also announced it's uncapping speeds internationally, offering a "10x-20x" speed boost.

The official post is pretty vague about what this means, but a Google spokesperson told TechCrunch, “Users will get the fastest connection available on a given network, speeds aren’t capped. In some cases, that would be LTE networks, in others it would be 3G networks (depending on roaming agreements). Different countries will have different speeds, which is why we set a range.”

All this carrier switching means Project Fi only works on a tiny handful of specialized hardware: the Nexus 6, Nexus 5X, and Nexus 6P. Starting at 10:00am PT today, Google is running a promotion on the Nexus 6P, selling it for $150 off when you activate it with Project Fi. Be warned that a fresh set of Nexus devices will probably be on the way soon, however.