Roaming Internet is a basic option that is active/enabled when the subscriber number is activated. Activation and deactivation of the "roaming internet" service is done through the "My A1" application. For complete cost protection, you can activate a package for mobile internet in roaming, with which you have complete protection from unwanted costs, and at the same time have a different experience where you have all the information on your smartphone just as if you were at home.