It is doubtful Google would name its new mobile service “Project Fi” if it were really aiming for a service with large numbers of customers. Instead, Google calls it a “program” that is “similar” to the Nexus hardware program.
In other words, Project Fi is a smaller scale effort to demonstrate what can be done. Google confirmed that Sprint and T-Mobile US will provide mobile connectivity for Project Fi.
Among the project objectives is pioneering what should be standard when the fifth generation mobile network standard is finished: the ability to connect to the best-available network, “right now.”
Project Fi will automatically select the best network, whether a Wi-Fi hotspot or a specific 4G LTE network.
When a voice session begins while connected to Wi-Fi, Project Fi will seamlessly transition from Wi-Fi to mobile networks so sessions are not interrupted.
Project Fi also uses cloud-based phone numbers, allowing customers to talk on any number of Internet-connected devices, not just phones.
Google also will test a “simple” approach to service plans, offering just one plan. For $20 a month customers get talk, text, Wi-Fi tethering, and international coverage in 120+ countries), with a flat $10 per GByte for mobile data while in the U.S. and abroad.
:Since it's hard to predict your data usage, you'll get credit for the full value of your unused data,” Google says. “You only pay for what you use.”
Project Fi is in an “early invite” stage, using the Nexus 6 device.
If you live where we have coverage in the U.S., request an invite at fi.google.com to get started.