The new offering allows up to six people to share a plan, with new members joining the Fi Basics plan (which covers unlimited talk and text) at any time for $15 a month per line. As with individual plans, users on group plans pay for the data they use at a rate of $10/GB. Customers are credited for unused data.
Members can view their own data usage with the Project Fi app, and they can set data notifications to help pace their usage. Plan managers, meanwhile, can view the usage of all members, set monthly allowances per member, and pause data service if a member goes overboard.
While the voice and data plans are relatively inexpensive, Project Fi only works with a limited number of phones designed by Google, including the new Pixel devices. On Tuesday, to encourage people to sign up for group plans, Google also announced it's offering $100 off the Nexus 6P and $150 off the Nexus 5X for customers who buy and activate their phones through Project Fi.