I just need some explaintions regarding these Mobile Data and Data Roaming. Turning-on the Mobile Data alone won't let me go online. So, I need to enable the Data Roaming first before my Smartphone can go online.
What's with Data Roaming? Why I need to turn-on the Data Roaming before I can go online?
What's the difference between Mobile Data and Data Roaming?
I would be happy if someone can answer my queries. Thanks :)