Visible users will need another service to roam

With a consistent $40 per month plan and no variations, you give up a few options. Reliable data at home or abroad : Google Fi (From $20/mo. Advertisement

If you travel all the time, it really may be worth considering how a service like Google Fi might work for you when compared to Visible. Best answer: No. One option may be to use a service like Google Fi only when you travel. Visible only provides service in the U.S., so you’ll need to use another SIM card for international usage. at Visible)
Service at home

Simplicity is the game that Visible is playing. : Visible Unlimited ($40/mo. With this, you’ll only need to pay for the $20 line … You could also use a local prepaid SIM when traveling, though I would recommend arranging this ahead of schedule. at Google Fi)
Simple, affordable, and unlimited in the U.S. Visible uses Verizon’s LTE network for service, and while this provides great coverage in the U.S., if you’re leaving the country, you’ll need to do a little extra work.