Google has officially opened the doors to every that wants to sign-up for their Project Fi cellular service as the search giant has announced they are dropping their invite only requirement to join the program. In addition, those joining the program before April 7th will be offered the deepest discount ever on the Nexus 5X. If you buy the phone through Project Fi and activate it, you can get the normally $349 Nexus 5X for just $199.
Project Fi is Google's first ever attempt at breaking into the MVNO cellular service. It offers users a pre-pay service with no contracts. Services utilize cell towers rented from Sprint and T-Mobile, switching automatically between whichever gives you the best services at the time. The service then combines all the best features of Google Voice, like visual voicemail, number forwarding, and the ability to send and receive SMS messages from any computer and via the Google Hangouts app.
One major downside, that Google is still apparently working on, is that the service is only available in limited areas and with very limited device compatibility—the Network switching feature means Fi only works on the Nexus 5X, 6, and 6P. The upside is that all calls on Fi are made over Wi-Fi by default if that’s available (and how doesn't have Wi-Fi these days), and then switches to the cellular network when a user moves out of range of a Wi-Fi signal.
Project Fi charges a $20 base fee for unlimited texting and calls, plus $10 per GB of data you use. Fi customers also only pay for the data they use, and then are credited with any data left over. So if you sign up and pay $20 for calls, plus $30 for 3 GB of data but only end up using 2 GB, you’ll get $10 credited back on your account at the end of the month.
For more details checkout the Project Fi home page as well as the Project Fi FAQ