Project Fi will be available through Sprint ##net and T - net 's networks . It costs $ 250 for basic service and unused data is paid back to customer . The invitation - only service will work only on $ 6 phones in the US . Numbers can live in the cloud so users can connect on any connected tablet .
Project Fi will be hosted through Sprint Corp and T-Mobile 's networks . It costs $ 20 for basic service and unused data is paid back to customer . The invitation-only service will work only on Nexus 6 phones in the US . Numbers will live in the cloud so users can talk on any connected tablet .