Google on Monday opened its Project Fi mobile phone service to anyone in the United States using its latest model Nexus smartphones. The public launch of Project Fi marked the end of a 10-month, invitation-only test phase and comes as the Internet giant's first foray in being a mobile phone service provider. "We're excited to be exiting our invitation-only mode and opening up Project Fi so that people across the US can now sign up for service without having to wait in-line for an invite," product manager Simon Arscott said in a blog post.



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