Ever since Google launched Project Fi, you've had to hop between just two networks: Sprint and T-Mobile. But what if you're in an area where one or neither is particularly great? You might have an easier time of things after today. US Cellular has signed up as Project Fi's third partner, giving you both better overall coverage and a greater chance of staying on speedy LTE data. You should see it reach your phone sometime in the "coming weeks." It's probably not the additional network you were hoping for (AT&T or Verizon, anyone?), but it could mean the difference between a rock-solid connection and having to wait for WiFi.