Roaming allows you to make calls, send texts, and use wireless data even when you're outside of your network's boundaries. The downside, of course, is that roaming data usually comes with extra charges to your account. ... If you have the roaming feature turned on, all of this will happen automatically.

Does roaming use more data?

What is the difference between mobile data and data roaming? There is no real difference between mobile data and data roaming except for the fact that roaming allows your phone to access internet service using another network.

Should my data roaming be on or off?

When you use another mobile network to access the internet on your phone while still being billed by your normal provider. It can be pricey, so many experts advise people to turn data roaming off while they are abroad.