Heavy data use is expensive, but it doesn't have to be, consider activating one of the KnowRoaming Unlimited Data Packages, available for purchase right from your app.
1.) To purchase your Unlimited Data Package
In the KnowRoaming App, select the “Services” tab, and then tap “Packages”. Tap “Add to Cart” to add the Unlimited Data Package to your shopping cart. From your Cart/Checkout, you will be able to finalize your purchase. You’ll have the option to activate it immediately after you purchase, or at a later time of your choosing. This allows you to buy a package before your trip, or while you're already abroad.
2.) To activate your Unlimited Data Package
In the KnowRoaming App, select the “Services” tab, and then tap “Packages”. Tap “Activate” next to the package you wish to use.