As the subject says - do you need to have data roaming turned on in order to use data when roaming on Vodafone? I'm setting phones up for my parents, who are fairly technologically illiterate. Ideally I'd like to switch it off, as if it's turned on they will forget to switch it off when they travel overseas.

I know the APN needs to be set to internet, just not sure about data roaming needing to be enabled.

Thanks
Nick