Google Fi adds second 5G network support in new super network upgrade

Google has announced a super network upgrade for its Google Fi cell service, introducing support for a second 5G network. For the past few years, the mobile virtual network operator operated exclusively on the T-Mobile network inside the United States.

Originally launched in 2015 as Project Fi with support for both T-Mobile and Sprint service, the provider shifted to a single-network model after T-Mobile absorbed Sprint. With the latest update, phones connected to Google Fi will once again be able to hop between T-Mobile 5G and a different carrier network to provide improved speed, reception, and connectivity.

Device Compatibility and Network Restrictions

Despite the rollout, a Google spokesperson declined to name the second network when reached for comment, noting only that the service supports two of America's best 5G cellular networks.

The network switching feature currently has specific hardware requirements. Automatic carrier switching is supported only on the Pixel 9, Pixel 10, and Pixel 11 series, with other devices scheduled to receive access in 2027. Additionally, traditional dual-SIM functionality cannot be used simultaneously with the automatic switching feature, which requires Google Fi to be configured as an eSIM with all non-Fi SIMs disabled. Eligible users on Unlimited Premium and Flexible plans receive the update at no additional cost.