Because you'll be away from home, you're going to use a lot more data than you normally would back home.
You could easily use up 100MB or more just from a quick look on Google Maps, a browse on Facebook or checking email.
Consider also that you won't be connecting to your usual home Wi-Fi, so you'll be using even more data.
Our USA sim card is also fully compatible with Hotspot on your phone so you'll be able to connect your laptop too, and share the phone's data.
The USA Canada and Mexico Extreme Plan comes with 6GB data (that's 5,000MB) and you can add an extra 1GB (1,000MB) blocks of data (you can add extra data with your original order, or add it when you're in the USA). Many of our customers buy extra data when they're in the USA because they've used up all of the 6GB data in their plan.