Roam Mobility uses America's largest 4G network to bring you coverage of 96% of the US, including Hawaii and Puerto Rico. If you're in a city with more than 50,000 people in it, you can be confident you'll get 4G coverage.

Major highways and transport networks are also covered, so you'll remain connected during transit.

Where the 4G network is not yet in place there will normally be a 3G alternative that picks up your talk, text and data and allows you to stay connected, albeit at slightly slower speeds. You'll automatically be switched from 4G to 3G and back again as soon as you're within range of the 4G network.