Google Fi restores dual-network switching on Pixel 9 devices
The feature allows phones to swap between two 5G carriers automatically based on live signal quality.
By Tomas Rahman ·
Google is reactivating a multi-network feature for its Google Fi service. The update allows eligible phones to switch between two different 5G networks automatically. The system monitors connection quality in real time to determine when to change carriers. This rollout begins today on Pixel 9 and newer models.
Users must have Google Fi active on an eSIM to use the feature. Any other physical or eSIM cards in the device must be disabled. The phone keeps two network profiles on standby simultaneously. It uses a technology called Multi-IMSI to maintain these connections. The Android operating system tracks live signal strength to decide when to switch.
The last time Google Fi offered this capability in the US was in 2015. At that time, the service could jump between T-Mobile and Sprint networks. That option ended when T-Mobile acquired Sprint in 2020. The merger consolidated the wireless market in the country. Jane Harnett, a senior product manager for Google Fi Wireless, explained that previous mergers limited the company's ability to offer multiple domestic networks.
Harnett said the new system is faster than the original version. The old method used single-SIM switching. That process required the phone to wait for service to drop completely. It then performed a slow profile swap to another network. The new approach avoids that delay by keeping both profiles active. This results in a smoother transition with minimal battery impact.
Google has not named the specific carrier partner for the second network. The company's FAQ page currently lists T-Mobile as the primary network provider. Harnett declined to identify the additional network involved in the switch. The feature is designed to ensure users stay connected to the strongest available signal.
The update targets the modern eSIM infrastructure found in recent phones. It replaces the older dual-SIM method that required both a physical card and an eSIM. That previous iteration was slower to transition between networks. The new system leverages the hardware capabilities of newer Pixel devices. It allows for near-instant switching when a better connection is detected.
The feature is available immediately for qualifying devices. Users do not need to manually enable the switching function. It operates in the background based on signal metrics. Google Fi will continue to monitor the performance of this new setup. The company aims to improve coverage reliability for its subscribers in the United States.
