Data roaming isn't usually free (even with the best unlimited data plans). However, certain carriers include specific roaming features in their unlimited plans. For example, some carriers may offer free data roaming when traveling to Mexico or Canada.
People Also Ask
A lot of people are asking the question “Should I turn off mobile data when abroad?” Simple answer, yes. If you don't want to mess around with changing your cell phone plan or getting a local SIM card abroad, just turn off mobile data when abroad and use your phone as a mini computer via WiFi.