Mobile roaming allows you to use your mobile phone to make calls, send texts, and access the internet while traveling outside your home country. This service connects your phone to local network providers, enabling you to stay connected even when you're far from home. When you roam, your home carrier typically charges extra fees for using their service abroad. These fees can vary based on your location and the agreements your carrier has with local providers. It's important to check your carrier's roaming policies and rates before traveling to avoid unexpected charges.