Have you ever wondered how much data you should get with your carrier? Do you barely use your data plan but pay for a huge one anyways? Or do you go over data each month with your data plan and have no idea why? New in the iOS 7 Settings application is the ability to track cellular data usage per each app you have installed on your device.
In iOS 6, it shows you how much data you use, but it did not define or described what made up that number. To monitor and track your cellular data usage in iOS 7, first go into Settings.
Then tap on Cellular. If you scroll down a little bit at first you will see your total history. It will show your Call Time and total Cellular Data Usage, just like it did in iOS 6.
If you scroll down further, you will get an alphabetical list of all the apps have use cellular data.
If you scroll all the way down at the bottom, you will see a button called System Services. If you tap on that, it will show you how much cellular data you are using for things like Messaging Services, Push Notifications, Documents & Sync, iTunes Accounts, Siri, Voicemail, Software Updates, Find My iPhone, Diagnostics and Apple ID Services.
Data source: via 9To5Mac (By Sarah Guarino)