Data roaming is using the internet on your phone when you're abroad, whether browsing the web or sending an email. Smartphones are permanently connected to the internet, so you can use data without realising it. However, it can be costly.
Data roaming is using the internet on your phone when you're abroad, whether browsing the web or sending an email. Smartphones are permanently connected to the internet, so you can use data without realising it. However, it can be costly.