Google’s Project Fi invites are making their way into the world. But the company says the invites won’t reach everyone until mid-summer.

In an email sent late Thursday, Google said that given the number of requests it’s received it will take until mid-summer to get all the invites out. But Google said that in the coming weeks it will have a way for consumers to check on the status of their invites.

Google officially announced Project Fi in April and opened it to invites at that time, saying it would be sending out a “small number” of invites each week.

Project Fi is tapping Sprint and T-Mobile for Wi-Fi connectivity and also relying on public Wi-Fi to allow its customers to place calls, send texts and use mobile data. The service promises to credit customers back for data that goes unused during a billing cycle.

As of now, Project Fi can only be accessed with the Google Nexus 6. The smartphone was built with the software and hardware necessary for Project Fi’s network hopping and contains the company’s “special SIM” built for accessing multiple networks.