What does the data session symbol mean on a verizon phone?

Question

I just got a new phone and realized it shows these little left and right arrows on the top. The glossary says it means data session. What does that mean? Is that something you can turn off?

Answer 1

It means that you are using airtime, for example sending/receiving pictures and videos, going on the get it now service to download games, wallpaper, ringtones, etc. Unless you get a MB plan, you will be charged. Its $1.99 for every megabyte.