UPDATE September 11th, 2017: I've now been using Project Fi for 22 months and am still quite happy!!!
(For a 20$ credit that goes toward your bill use the referral code XA136C
I've been using Google's Project Fi for 14 months now.
Project Fi is a wireless MVNO service from Google that currently uses 3 different cellular networks to provide 4G LTE service to its customers. Your phone will automatically connect to the network that offers the best signal in the area you are in.
I've been using Project Fi for 14 months now and overall am very very happy with it, I left my AT&T grandfathered Unlimited plan after only a few weeks of testing Google's Project Fi. The catch with Fi is you pay for the data you use. You pay a flat 20$ for unlimited texting and calling in the U.S. and then you pay 1 penny per megabyte for the data you use. While it isn't great if you do a lot of streaming I found that I dropped from using 8-9gb a month to using 1.5-2gb a month in my first month of full-time usage which makes it considerably cheaper than my AT&T plan.
I've had no major complaints in my 14 months of using Project Fi and am quite happy with the service. Fi will use WiFi to handle calls and texts when you are on WiFi so if you have a poor signal at your house you'll still get good calls and get texts if you have WiFI at your house.
I'm very happy with having switched to Project Fi over a year ago!
Overall it's a great service and I give it my two thumbs up!
My Project Fi Referral code: EA33MY
The code will earn you a 20$ credit on your Project Fi bill if you remain a customer for the first month! Sign up on !