|Type||Mobile data and voice|
|Protocols||GSM / CDMA / HSPA+ / LTE|
|Use||Wireless smartphone service|
|Operator||Sprint, T-Mobile, U.S. Cellular, Three|
|Established||April 22, 2015|
Project Fi is a mobile virtual network operator by Google, providing phone, messaging and data services using both Wi-Fi and cellular networks belonging to Sprint, T-Mobile, U.S. Cellular, and Three. The service was launched on April 22, 2015 for the Nexus 6 through invitations only. The invitation system was dropped in March 2016, and support for additional devices, including the Pixel and Pixel XL smartphones, was introduced in October 2016.
Project Fi automatically switches between networks depending on signal strength and speed. It automatically connects to Wi-Fi hotspots with data encryption through an automatic VPN. Phone calls seamlessly transition between Wi-Fi and cellular networks. With all networks combined, Project Fi covers more than 135 countries around the world.
Plans are based on a flat rate, in which a subscription costs $20 per month for unlimited calls and messaging plus a customizable data allowance costing an additional $10 per gigabyte. Money for any unused data is credited back to the user's account, while overuse of data costs an additional $10 per gigabyte in proportion to actual usage. A Group Plan, which lets users add members to their subscription, costs an additional $15 per user per month, and offers features including data overview, data notifications, monthly allowances, and the ability to pause users' data usages. A data-only SIM card can be used on supported tablets.
On January 17, 2018, Project Fi announced "bill protection" which caps charge for data at $60 if you use more than 6GB of data in a billing period. If the data used is greater than 15GB, then Fi may slow the data speed to 256kbps. The user can avoid the data slowdown by paying full price for the data used at $10 per GB. The "bill protection" also works with group plans maxing out the data charge at $85 for two people and $120 for three people and $140 for four people. The rate for unlimited calls and text is not affected by the new "bill protection" plan.
Project Fi has received positive reviews. Critics who tested the service for six months praised its pricing strategy, especially the money-back feature for unused data. They also enjoyed the "seamless" transition between Wi-Fi and cellular networks, and one critic enjoyed the customer service experience. However, the service received criticism for the limited number of phones supported, calling Project Fi "irrelevant" if users don't have and don't want any of those devices.