Most mobile carriers have a phone line for data usage checks. You can also see how much data is left in your online account or the company's app Data can cost you big bucks if you're not paying ...

Check data usage to see which apps are the biggest offenders This article explains how to check data usage on an Android device and recommends some ways you can cut back to save data and battery life.

Streaming and video calls consume significant amounts of data, and other apps may continue to use data in the background. Even if you have one of the best value data plans, keeping an eye on your data ...