Google Project Fi Aims for Seamless Connections Between Networks

Google announced Project Fi — its effort to define “the future of communications” by building a virtual mobile network service leveraging Wi-Fi the cellular infrastructure of carrier partners. For its U.S. launch, Google has confirmed T-Mobile and Sprint as partners.

Key points:

• No contracts.
• User phone numbers live in the cloud, enabling talk and text with your number on just about any phone, tablet or laptop. 
• Talk, text, Wi-Fi tethering and international coverage in 120+ countries for $20 a month 
• 1GB of mobile data is $10/month, 2GB is $20/month, 3GB is $30/month, and so on. 
• Credits are applied for unused data each month
• The Nexus 6 will the first smartphone to support the Project Fi SIM card
• Interested customers can request an invite to test the service.

http://googleblog.blogspot.com/2015/04/project-fi.html