Nokia Lumia 830 - Avoid going over your Data Limit
Avoid going over your Data Limit
Unless you are one of the lucky few who has an unlimited data plan, then you will want to avoid going over your monthly data limit. Fortunately there is a Windows Phone feature called Data Sense.
This feature allows you to monitor your data and Wi-Fi usage and also which Apps are using the most data. You can also set a download limit per month so you don’t go over your allowance which includes the ability to prevent background downloading when you are close to your limit.
Data Sense can be found in your App Drawer.