Manually switch carriers Project Fi I have heard that you can manually switch carriers when using Project Fi. How do I go about this? What is the easiest way?

Edit: Is there an app that does this too?
You can easily manually switch carriers in Project Fi:

Head into the Phone Dialer app that came with your Nexus phone, then type in these dialer codes to manually switch carrier:


Sprint = *#*#FISPR#*#*
T-Mobile = *#*#FITMO#*#*
US Cellular = *#*#FIDAN#*#*
Auto = *#*#FIAUTO#*#*


You can also download the Fi Info app, which automates the process a bit with a widget (I use it all the time).

Source and more info.