Jack Wallen / ZDNET

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ZDNET's key takeaways

If you have limited mobile data, pay attention.

This feature could save you money.

You control whether apps can use data in the background.

For some people, the idea of saving and controlling data usage on a phone isn't really an issue. If you don't happen to have an unlimited data plan, it's a different story. I've been in situations before when my phone warns me that I've exceeded 2GB of data (I can't remember how much data my plan gives me). When that happens, I tend to put the brakes on.

When those instances happen, I'm glad Android makes it easy for me to take control of data use.…