Google launches Project Fi, its mobile network for US-based Nexus 6 users

The Google mobile network is at last official: The company has launched its Project Fi service in the United States exclusively for Nexus 6 owners.

Detailed in a blog post, Google said Project Fi will cost $20 a month for the basic plan (talk, text, Wi-Fi tethering and coverage in 120+ countries), with an additional $10 monthly fee for each 1GB of data you desire. If you don’t use all of your purchased data in a month, you’ll receive a pro-rated amount refunded back to the account.

Google is working with T-Mobile and Sprint to expand its coverage; at the moment, it offers 4G in most major metropolitan areas, with 3G servicing other parts of America (Montana seems to be the least covered).

Project Fi is currently invite-only – request to be added here.

Previously: Google confirms it will trial its own mobile operator services in coming months