Fi users on phones sold on fi.google.com have access to multiple
carrier networks to stay connected as they travel domestically
and around the world. When multiple carrier networks are
available, Fi will move you to the network that our analysis
shows will give you the best Fi experience at your current
location. We're constantly learning and improving, to account
for factors such as newly-built towers or newly-available radio
frequencies. And if your current network is providing weak or no
coverage, we'll adjust in real time to find you a stronger
connection.