The service, which Google (GOOGL) debuted last April, lets customers only pay for the Internet data they use instead of a bulk plan. It also comes with useful features like Wi-Fi assistant, which automatically connects the device to available Wi-Fi when possible, a tracker for how much data has been used, SIM cards for using the service’s data plan with other devices like tablets, 24/7 customer support, and the ability to use the service even when traveling abroad for the same price.

“We launched Project Fi as an invitation-only Early Access program to make sure we could deliver the best quality of service to our first customers,” said Project Fi product manager Simon Arscott in a blog post. “Today, we’re excited to be exiting our invitation-only mode and opening up Project Fi so that people across the U.S. can now sign up for service without having to wait in-line for an invite.”

The only catch is that Project Fi still only works with Google’s Nexus devices (the Nexus 6, 6P, and 5X). Conveniently, Google is now discounting the Nexus 5X to $199 to let more people get on Project Fi. The company also currently works with Sprint (S) and T-Mobile (TMUS) to offer dual coverage, switching between the carrier and Project Fi to offer the best coverage at any moment.